case DM_PRINTOBJECT:
WinMessageBox(HWND_DESKTOP, /* Display message box */
hWnd, /* Curr window is owner */
"Printing customer details", /* Message box text */
"Print Message Received", /* Message box title */
0, /* No identifier */
MB_OK); /* Include okay button */
<Extract DRAGITEM pointer from mp1>
<Extract print queue name from mp2>
<Print item>
break;