How to SendMessage to MDI Child Form

[sandun]

Do you know how to find hwnd of control in MDI child form by using API calls and

How sendmessage or postmessage or sendkeys to that control in child window.

I tried it but, I couldn't do it.



[COLOR=red]

[ice_531]

I see you haven't posted much. So Welcome to VBForums

Try placing this in the API forum though....and if you search there you should find an answer if not i'll post an example.


ice

[ALL]

yes, i want to welcome u too.

you should play around the forum test area before officaly posting

and for your question, you should use the FindWindowEX:

Public Declare Function FindWindowEx Lib "user32" Alias "FindWindowExA" (ByVal hWnd1 As Long, ByVal hWnd2 As Long, ByVal lpsz1 As String, ByVal lpsz2 As String) As Long
'and i think you would want SendMessgeByString
Public Declare Function SendMessageByString Lib "user32" Alias "SendMessageA" (ByVal hWnd As Long, ByVal wMsg As Long, ByVal wParam As Long, ByVal lParam As String) As Long

[sandun]

Function FindWindowLike(strPartOfCaption As String, Optional strChildwincap As String) As String
Dim hwnd As Long
Dim hWnd1 As Long
Dim strCurrentWindowText As String
Dim r As Long
 
hwnd = GetForegroundWindow
 
Do Until hwnd = 0
        strCurrentWindowText = Space$(255)
        r = GetWindowText(hwnd, strCurrentWindowText, 255)
        strCurrentWindowText = Left$(strCurrentWindowText, r)
        'hWnd = GetWindow(hWnd, GW_CHILD)
        If InStr(1, LCase(strCurrentWindowText), LCase(strPartOfCaption)) <> 0 Then GoTo Found
        hwnd = GetWindow(hwnd, GW_HWNDNEXT)
Loop
 
Exit Function
Found:
 
If strChildwincap = "" Then GoTo EN
 
hWnd1 = hwnd
Do Until hWnd1 = 0
        hWnd1 = GetWindow(hWnd1, GW_CHILD)
        strCurrentWindowText = Space$(255)
        r = GetWindowText(hWnd1, strCurrentWindowText, 255)
        strCurrentWindowText = Left$(strCurrentWindowText, r)
        If InStr(1, LCase(strCurrentWindowText), LCase(strChildwincap)) <> 0 Then GoTo EN
Loop
 
 
EN:
FindWindowLike = hwnd & " Æ " & hWnd1
End Function
 
 
 
 
Then I Can Find MDI Child Window and I want to Send Key Strokes to the RICH TEXT BOX in that window 
 
How can I Do that thing ?