Hide process window with 'CreateProcess'
6
I'm using a procedure provided to me that'll run a process but I want the process to be run in the background without the window showing up. The call is
ExecProcess(ProgPath, '', False);
and the function is
function ExecProcess(ProgramName, WorkDir: string; Wait: boolean): integer;
var
StartInfo: TStartupInfo;
ProcInfo: TProcessInformation;
CreateOK: boolean;
ExitCode: integer;
dwExitCode: DWORD;
begin
ExitCode := -1;
FillChar(StartInfo, SizeOf(TStartupInfo), #0);
FillChar(ProcInfo, SizeOf(TProcessInformation), #0);
StartInfo.cb := SizeOf(TStartupInfo);
if WorkDir <> '' then
begin
CreateOK := CreateProcess(nil, Addr(ProgramName[1]), nil, Addr(WorkDir[1]),
false, CREATE_NEW_PROCESS_GROUP or NORMAL_PRIORITY_CLASS, nil, nil,
StartInfo, ProcInfo);
end
else
begin
CreateOK := CreateProcess(nil, Addr(ProgramName[1]), nil, nil, false,
CREATE_NEW_PROCESS_GROUP or NORMAL_PRIORITY_CLASS, nil, Addr(WorkDir[1]),
StartInfo, ProcInfo);
end;
{ check to see if successful }
if CreateOK then
begin
// may or may not be needed. Usually wait for child processes
if Wait then
begin
WaitForSingleObject(ProcInfo.hProcess, INFINITE);
GetExitCodeProcess(ProcInfo.hProcess, dwExitCode);
ExitCode := dwExitCode;
end;
end
else
begin
ShowMessage('Unable to run ' + ProgramName);
end;
CloseHandle(ProcInfo.hProcess);
CloseHandle(ProcInfo.hThread);
Result := ExitCode;
end;
I have tried to use the StartInfo.wShowWindow attribute with SW_MINIMIZE, SW_FORCEMINIMIZE and SW_SHOWMINIMIZED but it ain't working. I can see that the attribute is changing in the debugger but that's as much as I understand right now. Could someone point out what the problem is?
EDIT: If it matters I'm executing a couple of Fortran modules (.exe) with arguments that'll open up a CMD-window.
delphi delphi-xe5
edited Nov 24 '18 at 17:45
Rigel
10.1k14111224
asked Nov 6 '14 at 9:26
user3464658user3464658
84312
add a comment |
6
I'm using a procedure provided to me that'll run a process but I want the process to be run in the background without the window showing up. The call is
ExecProcess(ProgPath, '', False);
and the function is
function ExecProcess(ProgramName, WorkDir: string; Wait: boolean): integer;
var
StartInfo: TStartupInfo;
ProcInfo: TProcessInformation;
CreateOK: boolean;
ExitCode: integer;
dwExitCode: DWORD;
begin
ExitCode := -1;
FillChar(StartInfo, SizeOf(TStartupInfo), #0);
FillChar(ProcInfo, SizeOf(TProcessInformation), #0);
StartInfo.cb := SizeOf(TStartupInfo);
if WorkDir <> '' then
begin
CreateOK := CreateProcess(nil, Addr(ProgramName[1]), nil, Addr(WorkDir[1]),
false, CREATE_NEW_PROCESS_GROUP or NORMAL_PRIORITY_CLASS, nil, nil,
StartInfo, ProcInfo);
end
else
begin
CreateOK := CreateProcess(nil, Addr(ProgramName[1]), nil, nil, false,
CREATE_NEW_PROCESS_GROUP or NORMAL_PRIORITY_CLASS, nil, Addr(WorkDir[1]),
StartInfo, ProcInfo);
end;
{ check to see if successful }
if CreateOK then
begin
// may or may not be needed. Usually wait for child processes
if Wait then
begin
WaitForSingleObject(ProcInfo.hProcess, INFINITE);
GetExitCodeProcess(ProcInfo.hProcess, dwExitCode);
ExitCode := dwExitCode;
end;
end
else
begin
ShowMessage('Unable to run ' + ProgramName);
end;
CloseHandle(ProcInfo.hProcess);
CloseHandle(ProcInfo.hThread);
Result := ExitCode;
end;
I have tried to use the StartInfo.wShowWindow attribute with SW_MINIMIZE, SW_FORCEMINIMIZE and SW_SHOWMINIMIZED but it ain't working. I can see that the attribute is changing in the debugger but that's as much as I understand right now. Could someone point out what the problem is?
EDIT: If it matters I'm executing a couple of Fortran modules (.exe) with arguments that'll open up a CMD-window.
delphi delphi-xe5
edited Nov 24 '18 at 17:45
Rigel
10.1k14111224
asked Nov 6 '14 at 9:26
user3464658user3464658
84312
1
Is the other process console or GUI app? You have issues with signed and unsigned vars on the exit code. The second param of CreateProcess must be writable. Use UniqueString for that.
– David Heffernan
Nov 6 '14 at 10:12
1
Do not use+for merging flagsCREATE_NEW_PROCESS_GROUP + NORMAL_PRIORITY_CLASS, you must useoroperator, likeCREATE_NEW_PROCESS_GROUP or NORMAL_PRIORITY_CLASS. In this case result is same, but in many cases it wont.
– kibab
Nov 6 '14 at 10:37
In addition to what David said aboutUniqueString(), you should also usePChar(ProgramName)instead ofAddr(ProgramName[1]).
– Remy Lebeau
Nov 6 '14 at 18:13
add a comment |
6
6
6
2
I'm using a procedure provided to me that'll run a process but I want the process to be run in the background without the window showing up. The call is
ExecProcess(ProgPath, '', False);
and the function is
function ExecProcess(ProgramName, WorkDir: string; Wait: boolean): integer;
var
StartInfo: TStartupInfo;
ProcInfo: TProcessInformation;
CreateOK: boolean;
ExitCode: integer;
dwExitCode: DWORD;
begin
ExitCode := -1;
FillChar(StartInfo, SizeOf(TStartupInfo), #0);
FillChar(ProcInfo, SizeOf(TProcessInformation), #0);
StartInfo.cb := SizeOf(TStartupInfo);
if WorkDir <> '' then
begin
CreateOK := CreateProcess(nil, Addr(ProgramName[1]), nil, Addr(WorkDir[1]),
false, CREATE_NEW_PROCESS_GROUP or NORMAL_PRIORITY_CLASS, nil, nil,
StartInfo, ProcInfo);
end
else
begin
CreateOK := CreateProcess(nil, Addr(ProgramName[1]), nil, nil, false,
CREATE_NEW_PROCESS_GROUP or NORMAL_PRIORITY_CLASS, nil, Addr(WorkDir[1]),
StartInfo, ProcInfo);
end;
{ check to see if successful }
if CreateOK then
begin
// may or may not be needed. Usually wait for child processes
if Wait then
begin
WaitForSingleObject(ProcInfo.hProcess, INFINITE);
GetExitCodeProcess(ProcInfo.hProcess, dwExitCode);
ExitCode := dwExitCode;
end;
end
else
begin
ShowMessage('Unable to run ' + ProgramName);
end;
CloseHandle(ProcInfo.hProcess);
CloseHandle(ProcInfo.hThread);
Result := ExitCode;
end;
I have tried to use the StartInfo.wShowWindow attribute with SW_MINIMIZE, SW_FORCEMINIMIZE and SW_SHOWMINIMIZED but it ain't working. I can see that the attribute is changing in the debugger but that's as much as I understand right now. Could someone point out what the problem is?
EDIT: If it matters I'm executing a couple of Fortran modules (.exe) with arguments that'll open up a CMD-window.
delphi delphi-xe5
edited Nov 24 '18 at 17:45
Rigel
10.1k14111224
asked Nov 6 '14 at 9:26
user3464658user3464658
84312
I'm using a procedure provided to me that'll run a process but I want the process to be run in the background without the window showing up. The call is
ExecProcess(ProgPath, '', False);
and the function is
function ExecProcess(ProgramName, WorkDir: string; Wait: boolean): integer;
var
StartInfo: TStartupInfo;
ProcInfo: TProcessInformation;
CreateOK: boolean;
ExitCode: integer;
dwExitCode: DWORD;
begin
ExitCode := -1;
FillChar(StartInfo, SizeOf(TStartupInfo), #0);
FillChar(ProcInfo, SizeOf(TProcessInformation), #0);
StartInfo.cb := SizeOf(TStartupInfo);
if WorkDir <> '' then
begin
CreateOK := CreateProcess(nil, Addr(ProgramName[1]), nil, Addr(WorkDir[1]),
false, CREATE_NEW_PROCESS_GROUP or NORMAL_PRIORITY_CLASS, nil, nil,
StartInfo, ProcInfo);
end
else
begin
CreateOK := CreateProcess(nil, Addr(ProgramName[1]), nil, nil, false,
CREATE_NEW_PROCESS_GROUP or NORMAL_PRIORITY_CLASS, nil, Addr(WorkDir[1]),
StartInfo, ProcInfo);
end;
{ check to see if successful }
if CreateOK then
begin
// may or may not be needed. Usually wait for child processes
if Wait then
begin
WaitForSingleObject(ProcInfo.hProcess, INFINITE);
GetExitCodeProcess(ProcInfo.hProcess, dwExitCode);
ExitCode := dwExitCode;
end;
end
else
begin
ShowMessage('Unable to run ' + ProgramName);
end;
CloseHandle(ProcInfo.hProcess);
CloseHandle(ProcInfo.hThread);
Result := ExitCode;
end;
I have tried to use the StartInfo.wShowWindow attribute with SW_MINIMIZE, SW_FORCEMINIMIZE and SW_SHOWMINIMIZED but it ain't working. I can see that the attribute is changing in the debugger but that's as much as I understand right now. Could someone point out what the problem is?
EDIT: If it matters I'm executing a couple of Fortran modules (.exe) with arguments that'll open up a CMD-window.
delphi delphi-xe5
delphi delphi-xe5
edited Nov 24 '18 at 17:45
Rigel
10.1k14111224
asked Nov 6 '14 at 9:26
user3464658user3464658
84312
edited Nov 24 '18 at 17:45
Rigel
10.1k14111224
asked Nov 6 '14 at 9:26
user3464658user3464658
84312
edited Nov 24 '18 at 17:45
Rigel
10.1k14111224
edited Nov 24 '18 at 17:45
Rigel
10.1k14111224
edited Nov 24 '18 at 17:45
Rigel
10.1k14111224
10.1k14111224
asked Nov 6 '14 at 9:26
user3464658user3464658
84312
asked Nov 6 '14 at 9:26
user3464658user3464658
84312
asked Nov 6 '14 at 9:26
user3464658user3464658
84312
84312
1
Is the other process console or GUI app? You have issues with signed and unsigned vars on the exit code. The second param of CreateProcess must be writable. Use UniqueString for that.
– David Heffernan
Nov 6 '14 at 10:12
1
Do not use+for merging flagsCREATE_NEW_PROCESS_GROUP + NORMAL_PRIORITY_CLASS, you must useoroperator, likeCREATE_NEW_PROCESS_GROUP or NORMAL_PRIORITY_CLASS. In this case result is same, but in many cases it wont.
– kibab
Nov 6 '14 at 10:37
In addition to what David said aboutUniqueString(), you should also usePChar(ProgramName)instead ofAddr(ProgramName[1]).
– Remy Lebeau
Nov 6 '14 at 18:13
add a comment |
1
Is the other process console or GUI app? You have issues with signed and unsigned vars on the exit code. The second param of CreateProcess must be writable. Use UniqueString for that.
– David Heffernan
Nov 6 '14 at 10:12
1
Do not use+for merging flagsCREATE_NEW_PROCESS_GROUP + NORMAL_PRIORITY_CLASS, you must useoroperator, likeCREATE_NEW_PROCESS_GROUP or NORMAL_PRIORITY_CLASS. In this case result is same, but in many cases it wont.
– kibab
Nov 6 '14 at 10:37
In addition to what David said aboutUniqueString(), you should also usePChar(ProgramName)instead ofAddr(ProgramName[1]).
– Remy Lebeau
Nov 6 '14 at 18:13
1
1
Is the other process console or GUI app? You have issues with signed and unsigned vars on the exit code. The second param of CreateProcess must be writable. Use UniqueString for that.
– David Heffernan
Nov 6 '14 at 10:12
Is the other process console or GUI app? You have issues with signed and unsigned vars on the exit code. The second param of CreateProcess must be writable. Use UniqueString for that.
– David Heffernan
Nov 6 '14 at 10:12
1
1
Do not use
+ for merging flags CREATE_NEW_PROCESS_GROUP + NORMAL_PRIORITY_CLASS, you must use or operator, like CREATE_NEW_PROCESS_GROUP or NORMAL_PRIORITY_CLASS. In this case result is same, but in many cases it wont.– kibab
Nov 6 '14 at 10:37
Do not use
+ for merging flags CREATE_NEW_PROCESS_GROUP + NORMAL_PRIORITY_CLASS, you must use or operator, like CREATE_NEW_PROCESS_GROUP or NORMAL_PRIORITY_CLASS. In this case result is same, but in many cases it wont.– kibab
Nov 6 '14 at 10:37
In addition to what David said about
UniqueString(), you should also use PChar(ProgramName) instead of Addr(ProgramName[1]).– Remy Lebeau
Nov 6 '14 at 18:13
In addition to what David said about
UniqueString(), you should also use PChar(ProgramName) instead of Addr(ProgramName[1]).– Remy Lebeau
Nov 6 '14 at 18:13
add a comment |
1 Answer
1
active
oldest
votes
9
Use dwFlags with STARTF_USESHOWWINDOW to forced the usage of wShowWindow
StartInfo.wShowWindow := SW_HIDE;
StartInfo.dwFlags := STARTF_USESHOWWINDOW;
edited Nov 6 '14 at 18:11
Remy Lebeau
337k18260455
answered Nov 6 '14 at 9:37
bummibummi
25.1k85289
Thank you for taking the time, @TLama just gave me the same solution.
– user3464658
Nov 6 '14 at 9:38
Ups, @TLama sorry having open the the question I just could seeSW_HIDE, I did not realize the update of the comment. Maybe you should add it as answer and I'll delete mine.
– bummi
Nov 6 '14 at 9:41
2
STARTF_USESHOWWINDOWonly works for GUI apps, and even then it is only a hint, there is no 100% guarantee the app will actually honor it, depending on how it implements its UI. Standard UIs usingShowWindow()will honor it, though. For a console app, you can use theCREATE_NO_WINDOWflag in thedwCreationFlagsparameter ofCreateProcess().
– Remy Lebeau
Nov 6 '14 at 18:11
add a comment |
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1 Answer
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1 Answer
1
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oldest
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9
Use dwFlags with STARTF_USESHOWWINDOW to forced the usage of wShowWindow
StartInfo.wShowWindow := SW_HIDE;
StartInfo.dwFlags := STARTF_USESHOWWINDOW;
edited Nov 6 '14 at 18:11
Remy Lebeau
337k18260455
answered Nov 6 '14 at 9:37
bummibummi
25.1k85289
Thank you for taking the time, @TLama just gave me the same solution.
– user3464658
Nov 6 '14 at 9:38
Ups, @TLama sorry having open the the question I just could seeSW_HIDE, I did not realize the update of the comment. Maybe you should add it as answer and I'll delete mine.
– bummi
Nov 6 '14 at 9:41
2
STARTF_USESHOWWINDOWonly works for GUI apps, and even then it is only a hint, there is no 100% guarantee the app will actually honor it, depending on how it implements its UI. Standard UIs usingShowWindow()will honor it, though. For a console app, you can use theCREATE_NO_WINDOWflag in thedwCreationFlagsparameter ofCreateProcess().
– Remy Lebeau
Nov 6 '14 at 18:11
add a comment |
9
Use dwFlags with STARTF_USESHOWWINDOW to forced the usage of wShowWindow
StartInfo.wShowWindow := SW_HIDE;
StartInfo.dwFlags := STARTF_USESHOWWINDOW;
edited Nov 6 '14 at 18:11
Remy Lebeau
337k18260455
answered Nov 6 '14 at 9:37
bummibummi
25.1k85289
Thank you for taking the time, @TLama just gave me the same solution.
– user3464658
Nov 6 '14 at 9:38
Ups, @TLama sorry having open the the question I just could seeSW_HIDE, I did not realize the update of the comment. Maybe you should add it as answer and I'll delete mine.
– bummi
Nov 6 '14 at 9:41
2
STARTF_USESHOWWINDOWonly works for GUI apps, and even then it is only a hint, there is no 100% guarantee the app will actually honor it, depending on how it implements its UI. Standard UIs usingShowWindow()will honor it, though. For a console app, you can use theCREATE_NO_WINDOWflag in thedwCreationFlagsparameter ofCreateProcess().
– Remy Lebeau
Nov 6 '14 at 18:11
add a comment |
9
9
9
Use dwFlags with STARTF_USESHOWWINDOW to forced the usage of wShowWindow
StartInfo.wShowWindow := SW_HIDE;
StartInfo.dwFlags := STARTF_USESHOWWINDOW;
edited Nov 6 '14 at 18:11
Remy Lebeau
337k18260455
answered Nov 6 '14 at 9:37
bummibummi
25.1k85289
Use dwFlags with STARTF_USESHOWWINDOW to forced the usage of wShowWindow
StartInfo.wShowWindow := SW_HIDE;
StartInfo.dwFlags := STARTF_USESHOWWINDOW;
edited Nov 6 '14 at 18:11
Remy Lebeau
337k18260455
answered Nov 6 '14 at 9:37
bummibummi
25.1k85289
edited Nov 6 '14 at 18:11
Remy Lebeau
337k18260455
edited Nov 6 '14 at 18:11
Remy Lebeau
337k18260455
edited Nov 6 '14 at 18:11
Remy Lebeau
337k18260455
337k18260455
answered Nov 6 '14 at 9:37
bummibummi
25.1k85289
answered Nov 6 '14 at 9:37
bummibummi
25.1k85289
answered Nov 6 '14 at 9:37
bummibummi
25.1k85289
25.1k85289
Thank you for taking the time, @TLama just gave me the same solution.
– user3464658
Nov 6 '14 at 9:38
Ups, @TLama sorry having open the the question I just could seeSW_HIDE, I did not realize the update of the comment. Maybe you should add it as answer and I'll delete mine.
– bummi
Nov 6 '14 at 9:41
2
STARTF_USESHOWWINDOWonly works for GUI apps, and even then it is only a hint, there is no 100% guarantee the app will actually honor it, depending on how it implements its UI. Standard UIs usingShowWindow()will honor it, though. For a console app, you can use theCREATE_NO_WINDOWflag in thedwCreationFlagsparameter ofCreateProcess().
– Remy Lebeau
Nov 6 '14 at 18:11
add a comment |
Thank you for taking the time, @TLama just gave me the same solution.
– user3464658
Nov 6 '14 at 9:38
Ups, @TLama sorry having open the the question I just could seeSW_HIDE, I did not realize the update of the comment. Maybe you should add it as answer and I'll delete mine.
– bummi
Nov 6 '14 at 9:41
2
STARTF_USESHOWWINDOWonly works for GUI apps, and even then it is only a hint, there is no 100% guarantee the app will actually honor it, depending on how it implements its UI. Standard UIs usingShowWindow()will honor it, though. For a console app, you can use theCREATE_NO_WINDOWflag in thedwCreationFlagsparameter ofCreateProcess().
– Remy Lebeau
Nov 6 '14 at 18:11
Thank you for taking the time, @TLama just gave me the same solution.
– user3464658
Nov 6 '14 at 9:38
Thank you for taking the time, @TLama just gave me the same solution.
– user3464658
Nov 6 '14 at 9:38
Ups, @TLama sorry having open the the question I just could see
SW_HIDE, I did not realize the update of the comment. Maybe you should add it as answer and I'll delete mine.– bummi
Nov 6 '14 at 9:41
Ups, @TLama sorry having open the the question I just could see
SW_HIDE, I did not realize the update of the comment. Maybe you should add it as answer and I'll delete mine.– bummi
Nov 6 '14 at 9:41
2
2
STARTF_USESHOWWINDOW only works for GUI apps, and even then it is only a hint, there is no 100% guarantee the app will actually honor it, depending on how it implements its UI. Standard UIs using ShowWindow() will honor it, though. For a console app, you can use the CREATE_NO_WINDOW flag in the dwCreationFlags parameter of CreateProcess().– Remy Lebeau
Nov 6 '14 at 18:11
STARTF_USESHOWWINDOW only works for GUI apps, and even then it is only a hint, there is no 100% guarantee the app will actually honor it, depending on how it implements its UI. Standard UIs using ShowWindow() will honor it, though. For a console app, you can use the CREATE_NO_WINDOW flag in the dwCreationFlags parameter of CreateProcess().– Remy Lebeau
Nov 6 '14 at 18:11
add a comment |
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1
Is the other process console or GUI app? You have issues with signed and unsigned vars on the exit code. The second param of CreateProcess must be writable. Use UniqueString for that.
– David Heffernan
Nov 6 '14 at 10:12
1
Do not use
+for merging flagsCREATE_NEW_PROCESS_GROUP + NORMAL_PRIORITY_CLASS, you must useoroperator, likeCREATE_NEW_PROCESS_GROUP or NORMAL_PRIORITY_CLASS. In this case result is same, but in many cases it wont.– kibab
Nov 6 '14 at 10:37
In addition to what David said about
UniqueString(), you should also usePChar(ProgramName)instead ofAddr(ProgramName[1]).– Remy Lebeau
Nov 6 '14 at 18:13