DoModal()放回-1???
WNDCLASS wc;
BOOL b = GetClassInfo(AfxGetInstanceHandle(), _T("#32770"), &wc);
//wc.lpszClassName = _T("PCView_ScrPrintTool");//这样写对话框不能弹出
wc.lpszClassName = _T("PCView_ScrPrintTool");//这样写就可以弹出
DWORD dwRet = RegisterClass(&wc);
......
INT_PTR nResponse = dlg.DoModal();
类名和对话框弹出有什么关系???