2000下服务程序可以使用窗体吗？

Question

http://www.vckbase.com/vckbase/columnist/ac952_z_cn/default.asp

Answer 1

为什么认为服务程序一般不可以使用窗体？要知道那是2000不是unix,后台进程并不意味着一定没有窗体。窗体只是数据的观察器而已。有数据的运行体，当然最好有数据的察看与操作体。这样的服务程序才是可知。不要服务程序想象成什么端口守护进程，，，那只是比较原始的东西。像2000这种系统。光有数据运行体是不行的。不完整的。

Answer 2

BOOL CServiceModule::ShowMsgDlg(void)
{
       HDESK   hdeskCurrent;
    HDESK   hdesk;
    HWINSTA hwinstaCurrent;
    HWINSTA hwinsta;    hwinstaCurrent = GetProcessWindowStation();
    if (hwinstaCurrent == NULL){
              LogEvent(_T("get window station err"));
       return FALSE;
       }    hdeskCurrent = GetThreadDesktop(GetCurrentThreadId());
    if (hdeskCurrent == NULL){
              LogEvent(_T("get window desktop err"));
       return FALSE;
       }//打开winsta0
    hwinsta = OpenWindowStation("winsta0", FALSE,                          
                                  WINSTA_ACCESSCLIPBOARD   |
                                  WINSTA_ACCESSGLOBALATOMS |
                                  WINSTA_CREATEDESKTOP     |
                                  WINSTA_ENUMDESKTOPS      |
                                  WINSTA_ENUMERATE         |
                                  WINSTA_EXITWINDOWS       |
                                  WINSTA_READATTRIBUTES    |
                                  WINSTA_READSCREEN        |
                                  WINSTA_WRITEATTRIBUTES);
    if (hwinsta == NULL){
              LogEvent(_T("open window station err"));       return FALSE;
       }    if (!SetProcessWindowStation(hwinsta)){
              LogEvent(_T("Set window station err"));       return FALSE;
       }//打开desktop
    hdesk = OpenDesktop("default", 0, FALSE,                
                            DESKTOP_CREATEMENU |
                            DESKTOP_CREATEWINDOW |
                            DESKTOP_ENUMERATE    |
                            DESKTOP_HOOKCONTROL  |
                            DESKTOP_JOURNALPLAYBACK |
                            DESKTOP_JOURNALRECORD |
                            DESKTOP_READOBJECTS |
                            DESKTOP_SWITCHDESKTOP |
                            DESKTOP_WRITEOBJECTS);
       if (hdesk == NULL){
              LogEvent(_T("Open desktop err"));           return FALSE;
       }       SetThreadDesktop(hdesk);//到这一步，我们获取了和用户交互（如显示窗口）的权利
       CMsgDlg dlgMsg;
//显示一个dialog
       dlgMsg.DoModal();                     if (!SetProcessWindowStation(hwinstaCurrent))
           return FALSE;       if (!SetThreadDesktop(hdeskCurrent))
      return FALSE;       if (!CloseWindowStation(hwinsta))
              return FALSE;       if (!CloseDesktop(hdesk))
           return FALSE;              return TRUE;
}

Answer 3

http://www.csdn.net/expert/topic/574/574089.xml?temp=.1257288

Answer 4

http://www.csdn.net/expert/topic/574/574089.xml?temp=.1257288

Answer 5

对不起 lauyue(rax) 
分给的仓促，忘记你了
请到下面处领分，谢谢

Answer 6

http://www.csdn.net/expert/topic/724/724329.xml?temp=.9304163

Answer 7

//摘自MSDN的代码：DWORD dwGuiThreadId = 0; 
 
int 
UserMessageBox( 
    RPC_BINDING_HANDLE h, 
    LPSTR lpszWindowStation, 
    LPSTR lpszDesktop, 
    LPSTR lpszText, 
    LPSTR lpszTitle, 
    UINT fuStyle) 
{ 
    DWORD dwThreadId; 
    HWINSTA hwinstaSave; 
    HDESK hdeskSave; 
    HWINSTA hwinstaUser; 
    HDESK hdeskUser; 
    int result; 
 
    // Ensure connection to service window station and desktop, and 
    // save their handles.     GetDesktopWindow(); 
    hwinstaSave = GetProcessWindowStation(); 
    dwThreadId = GetCurrentThreadId(); 
    hdeskSave = GetThreadDesktop(dwThreadId); 
 
    // Impersonate the client and connect to the User's 
    // window station and desktop.     RpcImpersonateClient(h); 
    hwinstaUser = OpenWindowStation(lpszWindowStation, FALSE, MAXIMUM_ALLOWED); 
    if (hwinstaUser == NULL) 
    { 
        RpcRevertToSelf(); 
        return 0; 
    } 
    SetProcessWindowStation(hwinstaUser); 
    hdeskUser = OpenDesktop(lpszDesktop, 0, FALSE, MAXIMUM_ALLOWED); 
    RpcRevertToSelf(); 
    if (hdeskUser == NULL) 
    { 
        SetProcessWindowStation(hwinstaSave); 
        CloseWindowStation(hwinstaUser); 
        return 0; 
    } 
    SetThreadDesktop(hdeskUser); 
 
    // Display message box.     dwGuiThreadId = dwThreadId; 
    result = MessageBox(NULL, lpszText, lpszTitle, fuStyle); 
    dwGuiThreadId = 0; 
 
    // Restore window station and desktop.     SetThreadDesktop(hdeskSave); 
    SetProcessWindowStation(hwinstaSave); 
    CloseDesktop(hdeskUser); 
    CloseWindowStation(hwinstaUser); 
 
    return result; 
}