getting HWND from HINSTANCE
in [Visual C]
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From: Claudio on 16 Mar 2006 11:28 I call a ShellExecute like this and then I'd like to resize the window. How can I get the HWND from the HINSTANCE? thanks HINSTANCE result = ShellExecute(NULL, "open", MPEG4_DECODER, URL, NULL, SW_SHOWNORMAL);
From: Igor Tandetnik on 16 Mar 2006 11:57 Claudio <Claudio(a)discussions.microsoft.com> wrote: > I call a ShellExecute like this and then I'd like to resize the > window. How can I get the HWND from the HINSTANCE? > > HINSTANCE result = ShellExecute(...); Which one? An application may create multiple windows, or none at all. Assuming this particular application only creates one top-level window, this is what you can do. First, ShellExecute only returns HINSTANCE for backward compatibility. The return value is meaningless, except that when it's less than 32 it's an error code (and any value greater than 32 indicates success). You need to use ShellExecuteEx with SEE_MASK_NOCLOSEPROCESS flag, to obtain process handle. Then you call WaitForInputIdle, to get the process a chance to start up and actually create its main window. Use GetProcessId to obtain the process ID. You can now close the process handle with CloseHandle. Finally, enumerate all top-level windows with EnumWindows, and for each window use GetWindowThreadProcessId to find out whether it belongs to the process you are interested in. -- With best wishes, Igor Tandetnik With sufficient thrust, pigs fly just fine. However, this is not necessarily a good idea. It is hard to be sure where they are going to land, and it could be dangerous sitting under them as they fly overhead. -- RFC 1925
From: "CheckAbdoul" <checkabdoul at mvps dot on 16 Mar 2006 12:02 Use ShellExecuteEx() or CreateProcess() instead of ShellExecute() which will give you the process handle. You can enumerate through the top level windows created by the process. Search for "CMainWindowIterator" in msdn. -- Cheers Check Abdoul ------------------ "Claudio" <Claudio(a)discussions.microsoft.com> wrote in message news:226B247F-E75E-4764-8484-4793E3195FF6(a)microsoft.com... >I call a ShellExecute like this and then I'd like to resize the window. How > can I get the HWND from the HINSTANCE? > thanks > > HINSTANCE result = ShellExecute(NULL, > "open", > MPEG4_DECODER, > URL, > NULL, > SW_SHOWNORMAL); > >
From: Ben Voigt on 20 Mar 2006 16:21
"CheckAbdoul" <checkabdoul at mvps dot org> wrote in message news:eUC0utRSGHA.3192(a)TK2MSFTNGP09.phx.gbl... > Use ShellExecuteEx() or CreateProcess() instead of ShellExecute() which > will give you the process handle. You can enumerate through the top level > windows created by the process. Search for "CMainWindowIterator" in msdn. Use CreateProcess and appropriately set the STARTUPINFO structure, specifically: DWORD dwX; DWORD dwY; DWORD dwXSize; DWORD dwYSize; DWORD dwFlags;dwXIf dwFlags specifies STARTF_USEPOSITION, this member is the x offset of the upper left corner of a window if a new window is created, in pixels. Otherwise, this member is ignored. The offset is from the upper left corner of the screen. For GUI processes, the specified position is used the first time the new process calls CreateWindow to create an overlapped window if the x parameter of CreateWindow is CW_USEDEFAULT.dwYIf dwFlags specifies STARTF_USEPOSITION, this member is the y offset of the upper left corner of a window if a new window is created, in pixels. Otherwise, this member is ignored. The offset is from the upper left corner of the screen. For GUI processes, the specified position is used the first time the new process calls CreateWindow to create an overlapped window if the y parameter of CreateWindow is CW_USEDEFAULT.dwXSizeIf dwFlags specifies STARTF_USESIZE, this member is the width of the window if a new window is created, in pixels. Otherwise, this member is ignored. For GUI processes, this is used only the first time the new process calls CreateWindow to create an overlapped window if the nWidth parameter of CreateWindow is CW_USEDEFAULT.dwYSizeIf dwFlags specifies STARTF_USESIZE, this member is the height of the window if a new window is created, in pixels. Otherwise, this member is ignored. For GUI processes, this is used only the first time the new process calls CreateWindow to create an overlapped window if the nHeight parameter of CreateWindow is CW_USEDEFAULT.http://msdn.microsoft.com/library/default.asp?url=/library/en-us/dllproc/base/createprocess.asp http://msdn.microsoft.com/library/default.asp?url=/library/en-us/dllproc/base/startupinfo_str.asp > > -- > Cheers > Check Abdoul > ------------------ > > "Claudio" <Claudio(a)discussions.microsoft.com> wrote in message > news:226B247F-E75E-4764-8484-4793E3195FF6(a)microsoft.com... >>I call a ShellExecute like this and then I'd like to resize the window. >>How >> can I get the HWND from the HINSTANCE? >> thanks >> >> HINSTANCE result = ShellExecute(NULL, >> "open", >> MPEG4_DECODER, >> URL, >> NULL, >> SW_SHOWNORMAL); >> >> > > |