XmAddProtocolCallback(3X)
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## Name

XmAddProtocolCallback(3X) — XmAddProtocolCallback--A VendorShell function that adds client callbacks for a protocol XmAddProtocolCallbackVendorShell functionsprotocols

## Synopsis

#include <Xm/Xm.h>
#include <Xm/Protocols.h>
void XmAddProtocolCallback (`shell, property, protocol, callback, closure`)
Widget `shell`;
Atom `property`;
Atom `protocol`;
XtCallbackProc `callback`;
XtPointer `closure`;
void XmAddWMProtocolCallback (`shell, protocol, callback, losure`)
Widget `shell`;
Atom `protocol`;
XtCallbackProc `callback`;
XtPointer `closure`;

## DESCRIPTION

XmAddProtocolCallback adds client callbacks for a protocol. It checks if the protocol is registered, and if it is not, calls XmAddProtocols. It then adds the callback to the internal list. These callbacks are called when the corresponding client message is received.

XmAddWMProtocolCallback is a convenience interface. It calls XmAddProtocolCallback with the property value set to the atom returned by interning WM_PROTOCOLS.

`shell` |  | Specifies the widget with which the protocol property is associated.
`property` |  | Specifies the protocol property.
`protocol` |  | Specifies the protocol Atom (or an int type cast to Atom).
`callback` |  | Specifies the procedure to call when a protocol message is received.
`closure` |  | Specifies the client data to be passed to the callback when it is invoked.

For a complete definition of VendorShell and its associated resources, see VendorShell(3X).

## RELATED INFORMATION

VendorShell(3X), XmAddProtocols(3X), XmAddWMProtocolCallback(3X), and XmInternAtom(3X).

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XmActivateWMProtocol(3X) |  | XmAddProtocols(3X)