In your application's resource-definition file, provide a dialog box template for the dialog box that the user can use to cancel the print operation. Add the following statements:
AbortDlg DIALOG 20, 20, 90, 64
STYLE DS_MODALFRAME | WS_CAPTION | WS_SYSMENU
CAPTION "PrntFile"
BEGIN
DEFPUSHBUTTON "Cancel", IDCANCEL, 29, 44, 32, 14, WS_GROUP
CTEXT "Sending", -1, 0, 8, 90, 8
CTEXT "text", IDC_FILENAME, 0, 18, 90, 8
CTEXT "to print spooler.", -1, 0, 28, 90, 8
END