create a process window on topmost

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In my main application,I'mm calling a process named A.This process is calling another application B.Problem is,the process A is always top on my main window,but when process B starts it is situated behind my main window.It is occurring not every time I am doing the operation,but sometime.

After calling application A,I have applied wait for exit and then I am making main window thread to sleep(this is required in my case),in the mean time application B is started by A.This B process window sometime is behind the main window.

can any one suggest me to do anything?

Posted 16-Oct-14 0:14am

souvikcode

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Fredrik Bornander 16-Oct-14 6:44am

WinForms or WPF or something else?

souvikcode 17-Oct-14 3:00am

winform.

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Sinisa Hajnal · Answer 1 · 2014-10-16T01:21:00

Solution 1

Note that this is a copy of a solution from MSDN, cx and cy may not be needed for your particular case...

Try this if windows forms:

Process process = Process.Start(psi);
IntPtr windowHandle = process.MainWindowHandle;

RECT r;
GetWindowRect(new HandleRef(this, windowHandle), out r);

int cx = r.Right - r.Left;
int cy = r.Bottom - r.Top;

cx -= 20;
cy -= 20;

SetWindowPos(windowHandle, (IntPtr) SpecialWindowHandles.HWND_TOPMOST, r.Left, r.Top, cx, cy, SetWindowPosFlags.SWP_SHOWWINDOW);

If this helps, please take time to accept the solution.

Posted 16-Oct-14 1:21am

Sinisa Hajnal

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souvikcode 17-Oct-14 3:04am

I have seen this before but problem is I am not starting process B.I'm starting process A from my application and it is calling B.So to handle B I have to write code on A which is not possible.I think I can make you understand.

Sinisa Hajnal 17-Oct-14 3:09am

Well, you can still get process B by GetProcessByName or some other function, right?

Conversely, if you minimize app A (if you have such control) B window will be visible. See if there is a flag HIDEWINDOW and use that for process A, again process B will remain visible.

souvikcode 17-Oct-14 3:45am

I can not handle process A,this is actually installer exe.I have minimized the main application window after closing App A so that app B is visible,but when I run the whole thing from a folder,the main app is minimized and app B is maximized but it is then behind the folder window (i.e,folder is opened and all exes are there).If I minimize folder window then I can see app B.

You are right,I can get process B by getprocess by name.But When app A is closed then app B is started right?But if machine has low processor speed,then my main application's getprocessbyname() function is firing before and then app B is started.So it can not find B.That's why I am making main thread to sleep for 3 sec and then getprocessbyname().So if I handle process B then it will be handled after 3sec,right?But in the mean time process B is started.So it becomes behind.