DoModal Returns -1 Getlasterror 说句柄无效

Question

我正在使用 Win32 应用程序，在此 DoModal 函数中 returns -1 和 GetlastError() returns 6（无效句柄）。我尝试删除 GDI 句柄以修复 GDI 排气，结果失败。

附加信息：我正在使用 Visual Studio 2012，此应用程序适用于 Compact 2013。

if(!bDeviceOpened)
{     
  bDeviceOpened=OpenDriver();


  if(bDeviceOpened == 0)
  {
    AfxMessageBox(_T("Please make sure the driver is up and runnning"));
    return FALSE;
  }

}

//Reading the Driver version
DWORD   nBytesReturned = 0;
    if(!GetOID(OID_RPS_DRIVER_STATS, &stats, sizeof(stats), &nBytesReturned) )
      {
        AfxMessageBox(_T("Failed to query the stats"));
      }

m_pMainWnd = &dlg;
int nResponse = dlg.DoModal();

if (nResponse == IDOK)
{
    // TODO: Place code here to handle when the dialog is
    //  dismissed with OK
}
else if (nResponse == IDCANCEL)
{
    // TODO: Place code here to handle when the dialog is
    //  dismissed with Cancel
}

为什么我没有收到对话框？

Answer 1

DoModal() returns -1 当您的资源未正确映射到对话框时。如果你进入 DoModal() 你会发现 statement

// return -1 in case of failure to load the dialog template resource

我建议您在 DoModal().

之前调用 AfxSetResourceHandle(); 函数

DoModal Returns -1 Getlasterror 说句柄无效

DoModal Returns -1 Getlasterror says Invalid handle

c++

mfc

dialog

windows-ce

visual-studio-2012