Introduction - If you have any usage issues, please Google them yourself
VC write OCX control of the process is a conventional MFC DLL, it achieved a simple function, like Static Control. It can show a text when users click the left mouse button, the controls became a father window click send alerts to respond to two user-defined information. WM_SETCONTROLTEXT (setting displays the text) WM_GETCONTROLTEXT (to be shown in the text)