[This is preliminary documentation and is subject to change.]

The CallNextHookEx function passes the hook information to the next hook procedure in the current hook chain. A hook procedure can call this function either before or after processing the hook information.

Namespace: Tools.API.Hooks
Assembly: Tools.Win (in Tools.Win.dll) Version: 1.5.3.38916 (1.5.3.38916)

Syntax

C#
protected IntPtr CallNextHook(
	int nCode,
	IntPtr wParam,
	IntPtr lParam
)
Visual Basic
Protected Function CallNextHook ( _
	nCode As Integer, _
	wParam As IntPtr, _
	lParam As IntPtr _
) As IntPtr
Visual C++
protected:
IntPtr CallNextHook(
	int nCode, 
	IntPtr wParam, 
	IntPtr lParam
)
F#
member CallNextHook : 
        nCode:int * 
        wParam:IntPtr * 
        lParam:IntPtr -> IntPtr
JScript
protected function CallNextHook(
	nCode : int, 
	wParam : IntPtr, 
	lParam : IntPtr
) : IntPtr

Parameters

nCode
Type: System..::..Int32
[in] Specifies the hook code passed to the current hook procedure. The next hook procedure uses this code to determine how to process the hook information.
wParam
Type: System..::..IntPtr
[in] Specifies the wParam value passed to the current hook procedure. The meaning of this parameter depends on the type of hook associated with the current hook chain.
lParam
Type: System..::..IntPtr
[in] Specifies the lParam value passed to the current hook procedure. The meaning of this parameter depends on the type of hook associated with the current hook chain.

Return Value

This value is returned by the next hook procedure in the chain. The current hook procedure must also return this value. The meaning of the return value depends on the hook type. For more information, see the descriptions of the individual hook procedures.

Remarks

Hook procedures are installed in chains for particular hook types. CallNextHookEx calls the next hook in the chain.

Calling CallNextHookEx is optional, but it is highly recommended; otherwise, other applications that have installed hooks will not receive hook notifications and may behave incorrectly as a result. You should call CallNextHookEx unless you absolutely need to prevent the notification from being seen by other applications.

See Also