EM_GETEVENTMASK  5M0IID 

The EM_GETEVENTMASK message retrieves the event mask for a rich edit control. The event mask specifies which notification messages the control sends to its parent window.

EM_GETEVENTMASK

wParam = 0;  // not used; must be zero

lParam = 0;  // not used; must be zero

Return Values

Returns the event mask for the rich edit control.