Method WindowsHook.ThreadCbt

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Overload

Sets a WH_CBT hook for a thread of this process. See API SetWindowsHookEx.

public static WindowsHook ThreadCbt(Func<HookData.ThreadCbt, bool> hookProc, int threadId = 0, bool setNow = true)

Parameters

hookProc  (Func<HookData.ThreadCbt, bool>) Hook procedure (function that handles hook events). Must return as soon as possible. If returns true, the event is canceled. For some events you can modify some fields of event data. note When the hook procedure returns, the parameter variable becomes invalid and unsafe to use. If you need the data for later use, copy its properties and not the variable.

threadId  (int) Native thread id, or 0 for this thread. The thread must belong to this process.

setNow  (bool) Set hook now. Default true.

Returns

WindowsHook New WindowsHook object that manages the hook.

Exceptions

AuException Failed.

Examples

using var hook = WindowsHook.ThreadCbt(x => {
	print.it(x.code);
	switch(x.code) {
	case HookData.CbtEvent.ACTIVATE:
		print.it(x.Hwnd);
		break;
	case HookData.CbtEvent.CREATEWND:
		var c=x.CreationInfo->lpcs;
		print.it(x.Hwnd, c->x, c->lpszName);
		c->x=500;
		break;
	}
	return false;
});
dialog.showOkCancel("hook");
//new Form().ShowDialog(); //to test MINMAX