The BroadcastSystemMessage function sends a message to the specified recipients. The recipients can be applications, installable drivers, Windows-based network drivers, system-level device drivers, or any combination of these system components.
long BroadcastSystemMessage(
DWORD dwFlags, | |
LPDWORD lpdwRecipients, | |
UINT uiMessage, | |
WPARAM wParam, | |
LPARAM lParam | |
); |
Value |
Meaning |
BSF_FLUSHDISK |
Flush the disk after each recipient processes the message. |
BSF_FORCEIFHUNG |
Continue to broadcast the message, even if the time-out period elapses or one of the recipients is hung.. |
BSF_IGNORECURRENTTASK |
Do not send the message to windows that belong to the current task. This prevents an application from receiving its own message. |
BSF_NOHANG |
Force a hung application to time out. If one of the recipients times out, do not continue broadcasting the message. |
BSF_NOTIMEOUTIFNOTHUNG |
Wait for a response to the message, as long as the recipient is not hung. Do not time out. |
BSF_POSTMESSAGE |
Post the message. Do not use in combination with BSF_QUERY. |
BSF_QUERY |
Send the message to one recipient at a time, sending to a subsequent recipient only if the current recipient returns TRUE. |
Value |
Meaning |
BSM_ALLCOMPONENTS |
Broadcast to all system components. |
BSM_ALLDESKTOPS |
Windows NT only: Broadcast to all desktops. Requires the SE_TCB_NAME privilege. |
BSM_APPLICATIONS |
Broadcast to applications. |
BSM_INSTALLABLEDRIVERS |
Windows 95: Broadcast to installable drivers. Windows NT: This value is not meaningful. |
BSM_NETDRIVER |
Windows 95: Broadcast to Windows-based network drivers. Windows NT: This value is not meaningful. |
BSM_VXDS |
Windows 95: Broadcast to all system-level device drivers. Windows NT: This value is not meaningful. |
When the function returns, this variable receives a combination of these values identifying which recipients actually received the message.
If this parameter is NULL, the function broadcasts to all components.
If the function succeeds, the return value is a positive value.
If the function is unable to broadcast the message, the return value is -1.
If the dwFlags parameter is BSF_QUERY and at least one recipient returned BROADCAST_QUERY_DENY to the corresponding message, the return value is zero. To get extended error information, call GetLastError.
If BSF_QUERY is not specified, the function sends the specified message to all requested recipients, ignoring values returned by those recipients.
Questions:
I am using BroadcastSystemMessage to send message to other destop(BSM_ALLDESKTOPS) on my system with SE_TCB_NAME privilege for message I am using ON_REGISTERED_MESSAGE. Messages are send recived on Windows 2000 Server, but not able to receive on windows 2000 professional+
file: /Techref/os/win/api/win32/func/src/f03_13.htm, 7KB, , updated: 2005/10/27 11:17, local time: 2024/12/24 23:37,
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