C / C++ / MFC

pMsg->wParam = MAKEWPARAM(IDC_BUTTON1, BN_CLICKED);

<br />
if (pMsg->wParam == VK_F2)<br />
{<br />
  PostMessage(WM_COMMAND, <br />
    MAKEWPARAM(IDC_BUTTON1, BN_CLICKED), <br />
    (LPARAM) ::GetDlgItem(GetSafeHwnd(), IDC_BUTTON1));<br />
  return true;<br />
<br />
// Convert it into a button click message.<br />
//			pMsg->message = WM_COMMAND;<br />
//			pMsg->wParam = MAKEWPARAM(IDC_BUTTON1, BN_CLICKED);<br />
//			pMsg->lParam = (LPARAM) ::GetDlgItem(GetSafeHwnd(), IDC_BUTTON1);<br />
}<br />

Note This member function is called by the framework to allow your application to handle a Windows message. The parameters passed to your function reflect the parameters received by the framework when the message was received. If you call the base-class implementation of this function, that implementation will use the parameters originally passed with the message and not the parameters you supply to the function.