Assume that win32sdk is programmed with VC++. In the message processing function of lresult callback wndproc (hwnd hwnd, uint message, wparam wparam, lparam lparam) automatically generated by the programming wizard, add the following code in the switch (message):

Case WM_CTLCOLORBTN:

{

HDC HDC edit =(HDC)wParam； SetTextColor(hdcEdit，RGB(0，0，0))； //Black

SetBkColor(hdcEdit，RGB(255，255，255))； //White

return(INT _ PTR)create solid brush(RGB(255，255，255))；

}

LParam is the HWND of the button at this time. If there are multiple buttons, you can compare them by (HWND)lparam.