# Re: 如何送一字串至某一视窗

Posted by 七枷社 on December 16, 1998 at 18:18:10:

In Reply to: 如何送一字串至某一视窗 posted by chjichin on December 16, 1998 at 12:50:36:

: 如何送一字串至某一视窗

希望下面的程式能帮到你。

You can use the FindWindow and PostMessage API functions to find a window and then close it. This example show how you can close down a Window with a caption of "Calculator".

Dim winHwnd As Long
Dim RetVal As Long
winHwnd = FindWindow(vbNullString, "Calculator")
Debug.Print winHwnd
If winHwnd <> 0 Then
RetVal = PostMessage(winHwnd, WM_CLOSE, 0&, 0&)
If RetVal = 0 Then
MsgBox "Error posting message."
End If
Else
MsgBox "The Calculator is not open."
End If
For this code to work, you must have declared the API functions in a module in your project. You must put the following in the declarations section of the module.

Declare Function FindWindow Lib "user32" Alias _
"FindWindowA" (ByVal lpClassName As String, _
ByVal lpWindowName As String) As Long
Declare Function PostMessage Lib "user32" Alias _
"PostMessageA" (ByVal hwnd As Long, ByVal wMsg As Long, _
ByVal wParam As Long, lParam As Any) As Long
Public Const WM_CLOSE = &H10

Follow Ups:

- Re: 如何送一字串至某一视窗 chjichin 11:51:11 12/18/98 (1)
  - Re: 如何送一字串至某一视窗 cww 16:47:47 12/18/98 (0)