First use WaitForInputIdle
to pause your program until the application has started and is waiting for user input (the main window should have been created by then), then use EnumWindows
and GetWindowThreadProcessId
to determine which windows in the system belong to the created process.
For example:
struct ProcessWindowsInfo
{
DWORD ProcessID;
std::vector<HWND> Windows;
ProcessWindowsInfo( DWORD const AProcessID )
: ProcessID( AProcessID )
{
}
};
BOOL __stdcall EnumProcessWindowsProc( HWND hwnd, LPARAM lParam )
{
ProcessWindowsInfo *Info = reinterpret_cast<ProcessWindowsInfo*>( lParam );
DWORD WindowProcessID;
GetWindowThreadProcessId( hwnd, &WindowProcessID );
if( WindowProcessID == Info->ProcessID )
Info->Windows.push_back( hwnd );
return true;
}
....
if( ShellExecuteEx(&sei) )
{
WaitForInputIdle( sei.hProcess, INFINITE );
ProcessWindowsInfo Info( GetProcessId( sei.hProcess ) );
EnumWindows( (WNDENUMPROC)EnumProcessWindowsProc,
reinterpret_cast<LPARAM>( &Info ) );
// Use Info.Windows.....
}