CODEWITHSUNDEEP
c#
sari
sari

Reputation: 21

How to ensure process window launched by Process.Start(ProcessStartInfo) has focus of all Forms?

c#.How to ensure process window launched by Process.Start(ProcessStartInfo) has focus of all Forms? Thanks,

Upvotes: 1

Views: 2962

Answers (2)

Oleg
Oleg

Reputation: 221997

Usage of SetForegroundWindow and other methods of setting of focus has a lot of restrictions. If you really want to be sure, that the started process will receive focus I recommend you to use following native (unmanaged) functions

SystemParametersInfo (SPI_GETFOREGROUNDLOCKTIMEOUT, 0, (PVOID)&dwLockedTimeout, 0);
SystemParametersInfo (SPI_SETFOREGROUNDLOCKTIMEOUT, 0, (PVOID)0,
                      SPIF_SENDWININICHANGE | SPIF_UPDATEINIFILE);

before process start and restore 

SystemParametersInfo (SPI_SETFOREGROUNDLOCKTIMEOUT, 0, (PVOID)&dwLockedTimeout,
                      SPIF_SENDWININICHANGE | SPIF_UPDATEINIFILE);

at the end. A call like

WaitForInputIdle (pi.hProcess, 5000);

after the program start and before restoring of SPI_SETFOREGROUNDLOCKTIMEOUT can be also helpful if you will have problems with immediate

Upvotes: 2

AJ.
AJ.

Reputation: 1671

Process.Start returns a Process object. To give the process focus, firstly set up the following PInvoke:

[DllImport("user32.dll")] static extern bool SetForegroundWindow(IntPtr hWnd);

Then, use:

MyProcess = Process.Start(ProcessStartInfo);
SetForegroundWindow(MyProcess.MainWindowHandle);

Upvotes: 1

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