User32SetWindowsHookEx Method

[DllImportAttribute("User32.dll", SetLastError = true)]
public static IntPtr SetWindowsHookEx(
	HookType hookType,
	DelegatesHookProc hookProc,
	IntPtr hInstance,
	uint threadId
)

<DllImportAttribute("User32.dll", SetLastError := true>]
Public Shared Function SetWindowsHookEx ( 
	hookType As HookType,
	hookProc As DelegatesHookProc,
	hInstance As IntPtr,
	threadId As UInteger
) As IntPtr

Dim hookType As HookType
Dim hookProc As DelegatesHookProc
Dim hInstance As IntPtr
Dim threadId As UInteger

Dim returnValue As IntPtr

returnValue = User32.SetWindowsHookEx(hookType, 
	hookProc, hInstance, threadId)

public:
[DllImportAttribute(L"User32.dll", SetLastError = true)]
static IntPtr SetWindowsHookEx(
	HookType hookType, 
	DelegatesHookProc^ hookProc, 
	IntPtr hInstance, 
	unsigned int threadId
)

[<DllImportAttribute("User32.dll", SetLastError = true)>]
static member SetWindowsHookEx : 
        hookType : HookType * 
        hookProc : DelegatesHookProc * 
        hInstance : IntPtr * 
        threadId : uint32 -> IntPtr 

No code example is currently available or this language may not be supported.

Parameters

hookType  HookType

The type of hook procedure to be installed.

hookProc  DelegatesHookProc

A pointer to the hook procedure.

If the threadId parameter is zero or specifies the identifier of a thread created by a different process, the HookProc parameter must point to a hook procedure in a DLL. Otherwise, HookProc can point to a hook procedure in the code associated with the current process.

hInstance  IntPtr

A handle to the DLL containing the hook procedure pointed to by the lpfn parameter.

The hInstance parameter must be set to Zero if the threadId parameter specifies a thread created by the current process and if the hook procedure is within the code associated with the current process.

threadId  UInt32

The identifier of the thread with which the hook procedure is to be associated.

For desktop apps, if this parameter is zero, the hook procedure is associated with all existing threads running in the same desktop as the calling thread.

Return Value

If the function fails, the return value is Zero.

To get extended error information, call GetLastWin32Error.

Reference