JVCL Help:RegisterWndProcHook@TControl@TJvControlHook@TJvHookOrder

 JVCL Help: RegisterWndProcHook function

JVCL Functions

► JvWndProcHook.pas Functions

[+] JvWndProcHook.pas Functions

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Summary

Registers a hook.

run\JvWndProcHook.pas

Pascal

 run\JvWndProcHook.pas

 functionRegisterWndProcHook(AControl: TControl; Hook: TJvControlHook; constOrder: TJvHookOrder): Boolean; overload;
functionRegisterWndProcHook(AHandle: THandle; Hook: TJvControlHook; constOrder: TJvHookOrder): Boolean; overload;

Parameters

Parameters	Description
AControl: TControl	Specifies the control to hook.
Hook: TJvControlHook	Specifies the control hook procedure.
const Order: TJvHookOrder	Specifies whether to receive messages before or after the control handles them.
AHandle: THandle	Specifies the handle to hook.

run\JvWndProcHook.pas

Description

Call RegisterWndProcHook to hook a control. Hooking a control allows you to respond to messages send to that control.
Use Order to specify whether you want to receive messages send to the hooked control, before or after the control handles them. By setting Order to hoBeforeMsg you can prevent the control to handle specific messages.
TJvWindowHook calls this method when it wants to start hooking the control. An internal list is maintained to prevent "broken links" when a hook is removed.
Call UnRegisterWndProcHook to unregister the hook.

run\JvWndProcHook.pas

See Also

UnRegisterWndProcHook

run\JvWndProcHook.pas

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