Moin Moin!
Hmm, versuch das mal mit SW_SHOWNOACTIVATE bzw. SW_SHOWMINNOACTIVE,
ok, hab ich vielleicht nicht deutlich gemacht, ich meinte dort
"nCmdShow [in]
Type: int
Controls how the window is to be shown. This parameter is ignored the first time an application calls ShowWindow, if the program that launched the application provides a STARTUPINFO structure. Otherwise, the first time ShowWindow is called, the value should be the value obtained by the WinMain function in its nCmdShow parameter. In subsequent calls, this parameter can be one of the following values. "