The ZGN_MOUSEMOVE notification message is sent when the user has moved the mouse pointer over the ZeeGrid data cell area. The parent window of the ZeeGrid control receives this notification message through the WM_COMMAND message.
ZGN_MOUSEMOVE
idZeeGrid = (int) LOWORD(wParam); //identifier of the ZeeGrid control
hwndZeeGrid = (HWND) lParam; //handle to the ZeeGrid control