Programmatically press a button on another application (C, Windows)

Question

I\'m trying to use the following code to press a button on my other application:

HWND ButtonHandle;
if( (wnd = FindWindow(0, \"Do you want to save?\")) )
{   
           


        

Answer 1

if you sure ButtonHandle are valid handle you can use pair WM_LBUTTONDOWN and WM_LBUTTONUP message instead of BN_CLICKED

HWND ButtonHandle;
if( (wnd = FindWindow(0, "Do you want to save?")) )
{   
    SendMessage(ButtonHandle, WM_LBUTTONDOWN, MK_LBUTTON, 0);
    SendMessage(ButtonHandle, WM_LBUTTONUP, MK_LBUTTON, 0);
}