There are instances when some application errors occur in our
program, it will be best to raise a generic message. This
might send an e-mail message or give a beep sound or any kind
of notifications. This is where user event comes into picture.
These kind of scenarios occur in most of the mission critical
applications. One need not keep looking at a log file for
errors being written to it continuously. User defined custom
events (user event) will be the best answer for this kind of
scenarios in MFC.
Follow these steps to raise such messages thru user event.
- Write
this declaration at the global level.
int CODERSOURCEMSG;
- Declare
a handler function for the message as "afx_msg void
onCODERSOURCEMSG();"
- Write
a handler function for the message
void onCODERSOURCEMSG()
{
MessageBox("Write your e-mail or beep code
here");
}
- Add
the following line in the Message Map
ON_REGISTERED_MESSAGE(CODERSOURCEMSG, onCODERSOURCEMSG)
- Whenever
you need to raise this user event call "PostMessage(CODERSOURCEMSG);