FIndWindow() not working after BM_CLICK

Question

I am using SendMessage() to send a BM_CLICK to a button that opens a popup window and then trying to use FindWindow() to find the ID for this window. When I manually click the button or press enter once selecting the button I can find the window ID fine but when I send the button a BM_CLICK message I am unable to find the window. I've set a timer in case I was looking for the window too early but no luck. Is there any difference between an actual click and using BM_CLICK that would cause this problem? Here is my code:

Call SendMessage(hist_ID, BM_CLICK, 0, 0)
Sleep 500

hist_window_id = FindWindow("ThunderRT6FormDC", "Select History Data")

timeout = 0
Do While hist_window_id = 0
    If timeout < 20 Then
        Sleep 50
        hist_window_id = FindWindow("ThunderRT6FormDC", "Select History Data")
        timeout = timeout + 1
    Else
        MsgBox "System Timeout"
        Exit Function
    End If
Loop

Yes I only get it when using BM_CLICK – Matt26 Jul 24 '15 at 15:05 — Matt26, Jul 24 '15 at 15:05
PostMessage() worked! Thanks for the help!! – Matt26 Jul 24 '15 at 15:14 — Matt26, Jul 24 '15 at 15:14

score 1 · Answer 1 · answered Jul 24 '15 at 15:16

1

SendMessage() waits for the message to be handled before continuing. If the button click event handler is displaying a modal window, it may be blocking your VB program until the window is dismissed. Use PostMessage() instead.

answered Jul 24 '15 at 15:16

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FIndWindow() not working after BM_CLICK

1 Answers1