Question

i tried to click on radio button of other process:

this is my code:

    Dim hh As IntPtr = Process.GetProcessesByName("MyProcess")(0).MainWindowHandle
    Dim TheSelectionBox As IntPtr = FindWindowEx(hh, 0, "Options:", "Button")
    ClickOnOption(TheSelectionBox, 2)

i have the “Options” box handle,
now i want to click on radio button in the “Options” box.
how can i click on the radio button?

Answer 1

The two radio buttons are in fact BUTTON controls. They are children of the containing group window. So you need to enumerate those children, by calling EnumChildWindows to find the appropriate button. Then you can send that button the BM_CLICK message to simulation pressing it.

By the way, FindWindowEx(hh, 0, "Options:", "Button") won’t find your window. You are asking it to match a window with class name Options: and title Button. I’m confident that call to FindWindowEx will return zero. Personally I’d call EnumChildWindows on the top level window and stop when you find a window with title "Option 2". And so avoid having to use FindWindowEx at all.