Edit Box flickering

Question

I'm trying to create an edit box inside my Win-32 application, but am having a bit of trouble. It will only show up under the circumstances that my mouse is moving, clicking and dragging at the same time, and it wil be flickering in and out of visibility

I create my initial window like this:

m_hWnd = CreateWindow(m_wWindowName.c_str(), m_wWindowName.c_str(), 
        WS_OVERLAPPEDWINDOW, CW_USEDEFAULT, CW_USEDEFAULT, width, height, 0, 0, m_hInstance, this); 

And then I try to create a new Edit box inside the existing window afterwards:

CreateWindowEx(WS_EX_CLIENTEDGE, 
        TEXT("Edit"), TEXT(""),
        WS_CHILD | WS_VISIBLE,
        10, 80,
        200, 20,
        m_hWnd, (HMENU)1, NULL, NULL);

EDIT: I am creating my initial window in its own class, by doing the following

int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE prevInstance,
                   PSTR cmdLine, int showCmd)
{
    CApplication Application;
    Application.Initialise(hInstance, MainWndProc, L"GUI Tool");

    return Application.Run();
}

The initialise function creates the window, and then directly after (still in the initialise function) I am attempting to create the edit box.

Could someone give some help as to why this is happening?

Thanks

Answer 1

It sounds like you're painting over the top of the control in your WM_PAINT handler (or this is being done by DefWindowProc).

The easiest solution is to set the WS_CLIPCHILDREN style on the parent window, which will automatically clip out any child windows when painting.