限制程序只有一个实例运行
bool COneInstanceApp::CheckAppIsOpen()
{
bool bTheFirstOne = true;;
::SetLastError(NO_ERROR);
::CreateMutex(NULL, false, "My OneInstance");
if (::GetLastError() == ERROR_ALREADY_EXISTS)
{
bTheFirstOne = false;
}
if ( !bTheFirstOne )
{
HWND hReporter = ::FindWindow(COneInstanceDlg::GetInstanceName(), NULL);
for (;!(hReporter = ::FindWindow(COneInstanceDlg::GetInstanceName(), NULL));)
Sleep(100);
int sw;
if (::IsZoomed(hReporter))
sw = SW_MAXIMIZE;
else if (::IsIconic(hReporter))
sw = SW_RESTORE;
else
sw = SW_SHOW;
::ShowWindow(hReporter, sw);
::SetForegroundWindow(hReporter);
return true;
}
return false;
}
