Change EditBox Color Directly?

[Caprice]

OnPaint() ?
Maybe you'll find something in MFC about subclassing, I don't know.
Without MFC it looks so:

1. WNDPROC wpOrigProc = (WNDPROC) SetWindowLong( hWnd, GWL_WNDPROC, (LONG) NewProc);

2. INT_PTR CALLBACK NewProc(HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam)
{
if (uMsg == WM_LBUTTONDOWN) {
} else if ( WhatYouWant ) {
} else {
return CallWindowProc(wpOrigLinkProc, hWnd, uMsg, wParam, lParam);
}
}

3 . don't forget about:
::SetWindowLong(hWnd, GWL_WNDPROC, (LONG)wpOrigProc);

Why you don't want to disturb the "parent" ?
That's the shortest way to change the color.