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SendWindowMessage Method

Sends a Windows message and its associated parameters to the specified task.

expression**.SendWindowMessage(Message**, wParam, IParam)

expression Required. An expression that returns a Task object.

Message    Required Long. A hexidecimal number that corresponds to the message you want to send. If you have the Microsoft Platform Software Development Kit, you can look up the name of the message in the header files (Winuser.h, for example) to find the associated hexadecimal number (precede the hexidecimal value with &h).

wParam   , lParam    Required Long. Parameters appropriate for the message you're sending. For information about what these values represent, see the reference topic for that message in the documentation included with the Microsoft Platform Software Development Kit. To retrieve the appropriate values, you may need to use the Spy utility (which comes with the kit).

Example

If Notepad is running, this example displays the About dialog box (in Notepad) by sending a WM_COMMAND message to Notepad. The SendWindowMessage method is used to send the WM_COMMAND message (111 is the hexidecimal value for WM_COMMAND), with the parameters 11 and 0. The Spy utility was used to determine the wParam and lParam values.

Dim taskLoop As Task

For Each taskLoop In Tasks
    If InStr(taskLoop.Name, "Notepad") > 0 Then
        taskLoop.Activate
        taskLoop.SendWindowMessage &h111, 11, 0
    End If
Next taskLoop

Applies to | Task Object

See Also | Activate Method | Tasks Property