XmSetProtocolHooks(3X)
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## Name

XmSetProtocolHooks(3X) — XmSetProtocolHooks--A VendorShell function that allows pre and post actions to be executed when a protocol message is received from MWM XmSetProtocolHooksVendorShell functionsprotocols

## Synopsis

#include <Xm/Xm.h>
#include <Xm/Protocols.h>
void XmSetProtocolHooks (`shell, property, protocol, prehook, pre_closure, posthook, post_closure`)
Widget `shell`;
Atom `property`;
Atom `protocol`;
XtCallbackProc `prehook`;
XtPointer `pre_closure`;
XtCallbackProc `posthook`;
XtPointer `post_closure`;
void XmSetWMProtocolHooks (`shell, protocol, prehook, pre_closure, posthook, post_closure`)
Widget `shell`;
Atom `protocol`;
XtCallbackProc `prehook`;
XtPointer `pre_closure`;
XtCallbackProc `posthook`;
XtPointer `post_closure`;

## DESCRIPTION

XmSetProtocolHooks is used by shells that want to have pre and post actions executed when a protocol message is received from MWM. Since there is no guaranteed ordering in execution of event handlers or callback lists, this allows the shell to control the flow while leaving the protocol manager structures opaque.

XmSetWMProtocolHooks is a convenience interface. It calls XmSetProtocolHooks 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 cast to Atom)
`prehook` |  | Specifies the procedure to call before calling entries on the client callback-list
`pre_closure` |  | Specifies the client data to be passed to the prehook when it is invoked
`posthook` |  | Specifies the procedure to call after calling entries on the client callback-list
`post_closure` |  | Specifies the client data to be passed to the posthook when it is invoked

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

## RELATED INFORMATION

VendorShell(3X), XmInternAtom(3X), and XmSetWMProtocolHooks(3X).

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