FindWindow FindWindowEx

Question

I have written a program that is to find a box in another program and set focus to it. Once this is done it will sendkeys and save to this box.

I am using Findwindow and

Answer 1

It looks like you want the second TPanel under the TttgCenterPanel.

In order to do that, you can find the first TPanel (you already did this), and after that, find the TPanel that is a descendant of TttgCenterPanel, and comes after the first TPanel. You need to pass hwndChild5 into the hwndChildAfter of FindWindowEx`.

' .... all the stuff you did before

Dim hWndChild5 As IntPtr = _
FindWindowEx(hWndChild4, IntPtr.Zero, "TttgCenterPanel", Nothing)
If hWndChild5.Equals(IntPtr.Zero) Then
    Return
End If

Dim hWndChild6 As IntPtr = _
FindWindowEx(hWndChild5, IntPtr.Zero, "TPanel", Nothing)
If hWndChild6.Equals(IntPtr.Zero) Then
    Return
End If

Dim hWndChild6Second As IntPtr = _
FindWindowEx(hWndChild5, hWndChild6, "TPanel", Nothing)
If hWndChild6Second.Equals(IntPtr.Zero) Then
    Return
End If

Dim hWndEdit As IntPtr = _
FindWindowEx(hWndChild6Second, IntPtr.Zero, "TttgDBEdit", Nothing)
If hWndEdit.Equals(IntPtr.Zero) Then
    Return
End If

SetForegroundWindow(hWndEdit)

From the MSDN documentation of FindWindowEx:

hwndChildAfter [in, optional]

Type: HWND

A handle to a child window. The search begins with the next child window in the Z order. The child window must be a direct child window of hwndParent, not just a descendant window.

If hwndChildAfter is NULL, the search begins with the first child window of hwndParent.

This approach will work if you are trying to find the second TPanel. If they are in random order each time, this will fail.