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sendmsg.c
Package: win2ksrc.rar　[view]
Upload User: caisha3
Upload Date: 2013-09-21
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Code Size: 3k
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Windows Develop

Development Platform:

Visual C++

sendmsg.c：Code Content
  2. /*************************************************************************
  3. *
  4. * sendmsg.c
  5. *
  6. * Copyright (c) 1985 - 1999, Microsoft Corporation
  7. *
  8. * Terminal Server (Hydra) specific code
  9. *
  10. * Processend message to winstation
  11. *
  12. * $Author:  Ara bernardi
  13. *
  14. *************************************************************************/
  16. //
  17. // Includes
  18. //
  20. #include "precomp.h"
  21. #pragma hdrstop
  23. #include "dbt.h"
  24. #include "ntdddisk.h"
  25. #include "ntuser.h"
  27. #include <winsta.h>
  28. #include <wstmsg.h>
  29. #include <winuser.h>
  32. //
  33. // Global variables
  34. //
  36. #if DBG
  37. void DumpOutLastErrorString()
  38. {
  39.     LPVOID  lpMsgBuf;
  41.     DWORD   error = GetLastError();
  43.     DBGHYD(("GetLastError() = 0x%lx n", error ));
  45.     FormatMessage(
  46.             FORMAT_MESSAGE_ALLOCATE_BUFFER |
  47.             FORMAT_MESSAGE_FROM_SYSTEM |
  48.             FORMAT_MESSAGE_IGNORE_INSERTS,
  49.             NULL,
  50.             error,
  51.             MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT), // Default language
  52.             (LPTSTR) &lpMsgBuf,
  53.             0,
  54.             NULL
  55.         );
  56.         //
  57.         // Process any inserts in lpMsgBuf.
  58.         // ...
  59.         // Display the string.
  60.         //
  61.         DBGHYD(("%sn", (LPCTSTR)lpMsgBuf ));
  63.         //
  64.         // Free the buffer.
  65.         //
  66.         LocalFree( lpMsgBuf );
  67. }
  68. #endif
  70. #if DBG
  71. #define DumpOutLastError    DumpOutLastErrorString()
  72. #else
  73. #define DumpOutLastError
  74. #endif
  77. /*******************************************************************************
  78.  *
  79.  *  RemoteDoBrroadcastSystemMessage
  80.  *
  81.  * ENTRY:
  82.  *
  83.  * EXIT:
  84.  *    STATUS_SUCCESS - successful
  85.  *
  86.  ******************************************************************************/
  88. NTSTATUS
  89. RemoteDoBroadcastSystemMessage(
  90.     PWINSTATION_APIMSG pMsg)
  91. {
  92.     LONG rc;
  93.     WINSTATIONBROADCASTSYSTEMMSG     *pmsg;
  94.     LPARAM      tmpLPARAM;
  95.     NTSTATUS    status;
  98.     pmsg = &(pMsg->u.bMsg);
  100.     if ( pmsg->bufferSize )
  101.     {
  102.         // we have a databuffer, set the lParam to our copied data buffer
  103.         tmpLPARAM = (LPARAM)pmsg->dataBuffer;
  104.     }
  105.     else
  106.     {
  107.         tmpLPARAM = pmsg->lParam ;
  108.     }
  110.     rc = BroadcastSystemMessage( pmsg->dwFlags, &pmsg->dwRecipients,
  111.                     pmsg->uiMessage, pmsg->wParam, tmpLPARAM );
  113.     status = STATUS_SUCCESS;
  115.     pmsg->Response = rc;
  117.     return status ;
  118. }
  122. NTSTATUS
  123. RemoteDoSendWindowMessage(
  124.     PWINSTATION_APIMSG pMsg)
  125. {
  126.     LONG rc;
  127.     NTSTATUS status;
  130.     WINSTATIONSENDWINDOWMSG  *pmsg;
  131.     LPARAM  tmpLPARAM;
  133.     pmsg = &(pMsg->u.sMsg);
  135.     if ( pmsg->bufferSize )
  136.     {
  137.         // we have a databuffer, set the lParam to our copied data buffer
  138.         tmpLPARAM = (LPARAM)pmsg->dataBuffer;
  139.     }
  140.     else
  141.     {
  142.         tmpLPARAM = (LPARAM)pmsg->lParam;
  143.     }
  145.     //
  146.     // No need to worry about disconnected sessions (desktop), since msg is sent to a specific hwnd.
  147.     // I have verified this imperically.
  148.     //
  150.     rc = (LONG)SendMessage( pmsg->hWnd, pmsg->Msg,
  151.                     pmsg->wParam, tmpLPARAM  );
  153.     status = STATUS_SUCCESS;
  155.     pmsg->Response = rc;
  157.     return status ;
  158. }