常用系统API
一 键盘
1.1 Disabling Low-level Keys
#define _WIN32_WINNT 0x0400
#include
LRESULT CALLBACK LowLevelKeyboardProc(int nCode,
WPARAM wParam, LPARAM lParam)
{
BOOL fEatKeystroke = FALSE;
if (nCode == HC_ACTION) {
switch (wParam) {
case WM_KEYDOWN:
case WM_SYSKEYDOWN:
case WM_KEYUP:
case WM_SYSKEYUP:
PKBDLLHOOKSTRUCT p = (PKBDLLHOOKSTRUCT) lParam;
fEatKeystroke =
((p->vkCode == VK_TAB) && ((p->flags & LLKHF_ALTDOWN) != 0)) ||
((p->vkCode == VK_ESCAPE) && ((p->flags & LLKHF_ALTDOWN) != 0)) ||
((p->vkCode == VK_ESCAPE) && ((GetKeyState(VK_CONTROL)&0x8000) != 0))||
( p->vkCode == VK_LWIN) || ( p->vkCode==VK_RWIN )
;
break;
}
}
return(fEatKeystroke ? 1 : CallNextHookEx(NULL, nCode, wParam,
lParam));
}
int WINAPI WinMain(HINSTANCE hinstExe, HINSTANCE, PTSTR pszCmdLine, int)
{
// Install the low-level keyboard & mouse hooks
HHOOK hhkLowLevelKybd = SetWindowsHookEx(WH_KEYBOARD_LL,
LowLevelKeyboardProc, hinstExe, 0);
// Keep this app running until we're told to stop
MessageBox(NULL,
TEXT("Alt+Esc, Ctrl+Esc, Alt+Tab, LWIN and RWIN are now disabled./n")
TEXT("Click /"Ok/" to terminate this application and re-enable these keys."),
TEXT("Disable Low-Level Keys"),
MB_OK);
UnhookWindowsHookEx(hhkLowLevelKybd);
return(0);
}
1.2 系统热键
1.屏蔽:SystemParametersInfo(SPI_SETSCREENSAVERRUNNING,true，0, SPIF_UPDATEINIFILE);
2.恢复:SystemParametersInfo(SPI_SETSCREENSAVERRUNNING,false, 0, SPIF_UPDATEINIFILE);
1.3 模拟按键
让系统模拟一次按下WIN+D键
keybd_event(VK_LWIN,0,0,0);
keybd_event('D',0,0,0);
keybd_event(VK_LWIN,0,KEYEVENTF_KEYUP,0);
keybd_event('D',0,KEYEVENTF_KEYUP,0);
1.4 切换到当前桌面
模拟最小化屏幕快捷键Window+D
keybd_event(VK_LWIN,0,0,0);
keybd_event('D',0,0,0);
keybd_event(VK_LWIN,0,KEYEVENTF_KEYUP,0);
keybd_event('D',0,KEYEVENTF_KEYUP,0);
---------------------------------------------------------------
正统的办法如下：
#include
#include
int main ()
{
CoInitialize (0);
IShellDispatch4 *pdisp = NULL;
CoCreateInstance (CLSID_Shell, NULL, CLSCTX_ALL, __uuidof (IShellDispatch4), (void **)&pdisp);
pdisp->ToggleDesktop (); // 这句是用来切换桌面的
pdisp->Release ();
CoUninitialize ();
};
1.5 调出关机选择画面
////////调出关机选择画面：（重启、关机、休眠、待机）
typedef int (CALLBACK *SHUTDOWNDLG)(int); //显示关机对话框函数的指针
HINSTANCE hInst = LoadLibrary("shell32.dll"); //装入shell32.dll
SHUTDOWNDLG ShutDownDialog; //指向shell32.dll库中显示关机对话框函数的指针
if(hInst != NULL)
{
//获得函数的地址并调用之
ShutDownDialog = (SHUTDOWNDLG)GetProcAddress(hInst,(LPSTR)60);
(*ShutDownDialog)(0);
}
二 鼠标
2.1 ::ClipCursor(&rect);
::ClipCursor(NULL);
2.2 一个未公开的API函数BlockInput，在user32.dll中，用它可以
轻易的锁定键盘和鼠标。
BOOL __stdcall (*BlockInput)(BOOL Flag);
(FARPROC)BlockInput = GetProcAddress(GetModuleHandle(
"user32.dll"), "BlockInput");
if (BlockInput) BlockInput(TRUE); //这样就可以了
三 显示器
3.1 关闭显示器
1. SendMessage( WM_SYSCOMMAND, SC_MONITORPOWER, 2);//关显示器
SendMessage( WM_SYSCOMMAND, SC_SCREENSAVE, 0);//运行屏保
2. ::SendMessage(GetSafeHwnd(), WM_SYSCOMMAND, SC_MONITORPOWER, 2);
3. SendMessage(HWND_BROADCAST,WM_SYSCOMMAND,SC_MONITORPOWER,2);
3.2 启动屏保
PostMessage(WM_SYSCOMMAND,SC_SCREENSAVE,0);
四 系统桌面
4.1 隐藏任务栏
隐藏 ::ShowWindow (::FindWindow("Shell_TrayWnd",NULL),SW_HIDE);
or ::ShowWindow (::FindWindow("Shell_TrayWnd",NULL),SW_HIDE);
显示 ::ShowWindow (::FindWindow("Shell_TrayWnd",NULL),SW_SHOW);
or ::ShowWindow (::FindWindow("Shell_TrayWnd",NULL),SW_SHOW);
4.2 在任务栏隐藏
SetWindowLong(Application,Handle,GWL_EXSTYLE,WS_EX_TOOLWINDOW);
4.3在任务管理器中隐藏
//定义RegisterServiceProcess函数的原型
typedef DWORD (CALLBACK* LPREGISTERSERVICEPROCESS)(DWORD,DWORD);
//注册应用程序的进程
//其中i = 0，将进程注册成非服务进程，这样，在Windows的关闭程序窗口中就不会出现应用程序
//的名称了。
// i = 1，将进程注册成服务进程，这是一般应用程序运行时所采用的状态。
void RegisterProcess(int i)
{
HINSTANCE hDLL;
LPREGISTERSERVICEPROCESS lpRegisterServiceProcess;
//加载RegisterServiceProcess函数所在的链接库
hDLL = LoadLibrary("KERNEL32");
//得到RegisterServiceProcess函数的地址
lpRegisterServiceProcess = (LPREGISTERSERVICEPROCESS)GetProcAddress(hDLL, "RegisterServiceProcess");
//执行RegisterServiceProcess函数
lpRegisterServiceProcess(GetCurrentProcessId(),i);
//卸载链接库
FreeLibrary(hDLL);
}
4.4启动屏保
SystemParametersInfo(SPI_SETDESKWALLPAPER,0,"C://*.BMP",WM_WININICHANGE);