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Toggling the Num Lock, Caps Lock, and Scroll Lock keys

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24 May 2002CPOL3 min read 253K   7K   65  
How to toggle the Num Lock, Caps Lock, and Scroll Lock keys programmatically
There are two more functions that can toggle keyboard state but each of them has some specific limitations like SendInput does. In this article, you will find all possible variants with their descriptions and limitations and a simple solution for toggling these keys avoiding compatibility problems.
// stdafx.h : include file for standard system include files,
//  or project specific include files that are used frequently, but
//      are changed infrequently
//

#if !defined(AFX_STDAFX_H__53B0D3BA_17E7_41A7_A0FC_FC9CCC970D3B__INCLUDED_)
#define AFX_STDAFX_H__53B0D3BA_17E7_41A7_A0FC_FC9CCC970D3B__INCLUDED_

#if _MSC_VER > 1000
#pragma once
#endif // _MSC_VER > 1000

#define VC_EXTRALEAN		// Exclude rarely-used stuff from Windows headers

#include <afxwin.h>         // MFC core and standard components
#include <afxext.h>         // MFC extensions
#include <afxdisp.h>        // MFC Automation classes
#include <afxdtctl.h>		// MFC support for Internet Explorer 4 Common Controls
#ifndef _AFX_NO_AFXCMN_SUPPORT
#include <afxcmn.h>			// MFC support for Windows Common Controls
#endif // _AFX_NO_AFXCMN_SUPPORT


//{{AFX_INSERT_LOCATION}}
// Microsoft Visual C++ will insert additional declarations immediately before the previous line.

#endif // !defined(AFX_STDAFX_H__53B0D3BA_17E7_41A7_A0FC_FC9CCC970D3B__INCLUDED_)

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License

This article, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)


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Software Developer (Senior) SafeNet Inc
United States United States
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