C/C++使用keybd_event模拟键盘按键

 #include <stdio.h>
 #include <Windows.h>

 /*
     设置键盘大小写状态
     big:为TRUE则切换大写状态,否则切换小写状态
 */
 VOID MySetKeyBig(BOOL big = FALSE);

 /*
     模拟键盘按键，支持大小写
     str:需要按出的字符串
 */
 VOID MyAnalogKey(char *str);

 int main(void)
 {
     // 当程序运行1.5s时再执行模拟按键，以便选择需要操作的窗口
     Sleep();
     MyAnalogKey("Love life,Love BiaoGe.0123456789");
     system("pause");
     return ;
 }

 VOID MySetKeyBig(BOOL big)
 {
     // 判断键盘CapsLock键是否开启状态,开启状态则为大写,否则为小写
     if (GetKeyState(VK_CAPITAL))
     {
         // 如果当前键盘状态为大写,要求改小写,则模拟按键CapsLock切换状态
         if (!big)
         {
             keybd_event(VK_CAPITAL, NULL, KEYEVENTF_EXTENDEDKEY | , NULL);
             keybd_event(VK_CAPITAL, NULL, KEYEVENTF_EXTENDEDKEY | KEYEVENTF_KEYUP, NULL);
         }
     }
     else
     {
         // 如果当前键盘状态为小写,要求改大写,则模拟按键CapsLock切换状态
         if (big)
         {
             keybd_event(VK_CAPITAL, NULL, KEYEVENTF_EXTENDEDKEY | , NULL);
             keybd_event(VK_CAPITAL, NULL, KEYEVENTF_EXTENDEDKEY | KEYEVENTF_KEYUP, NULL);
         }
     }
 }

 VOID MyAnalogKey(char *str)
 {
     int iLen = ;
     char *tmp = NULL;
     INPUT *keys = NULL;
     BOOL bOldState = FALSE;

     // 保存此操作前的键盘状态
     bOldState = (BOOL)GetKeyState(VK_CAPITAL);
     iLen = lstrlen(str);
     tmp = (char *)malloc(iLen);
     memmove(tmp, str, iLen);
     for (int i = ; i < iLen; i++)
     {
         // 某些符号非直属键盘按键,这里只过滤转换两个,以后用到其它字符自行添加过滤
         if (tmp[i] == ' ')
         {
             // 产生一个击键消息步骤:按下->抬起
             keybd_event(VK_SPACE, NULL, KEYEVENTF_EXTENDEDKEY | , NULL);
             keybd_event(VK_SPACE, NULL, KEYEVENTF_EXTENDEDKEY | KEYEVENTF_KEYUP, NULL);
         }
         else if (tmp[i] == ',')
         {
             keybd_event(VK_OEM_COMMA, NULL, KEYEVENTF_EXTENDEDKEY | , NULL);
             keybd_event(VK_OEM_COMMA, NULL, KEYEVENTF_EXTENDEDKEY | KEYEVENTF_KEYUP, NULL);
         }
         else if (tmp[i] >= 'a' && tmp[i] <= 'z')
         { // 根据字符大小写切换键盘大小写状态
             MySetKeyBig();
             // keybd_event只识别大写
             keybd_event((BYTE)tmp[i]-, NULL, KEYEVENTF_EXTENDEDKEY | , NULL);
             keybd_event((BYTE)tmp[i]-, NULL, KEYEVENTF_EXTENDEDKEY | KEYEVENTF_KEYUP, NULL);
         }
         else if ((tmp[i] >= 'A' && tmp[i] <= 'Z') || (tmp[i] >= '' && tmp[i] <= ''))
         {
             MySetKeyBig();
             keybd_event((BYTE)tmp[i], NULL, KEYEVENTF_EXTENDEDKEY | , NULL);
             keybd_event((BYTE)tmp[i], NULL, KEYEVENTF_EXTENDEDKEY | KEYEVENTF_KEYUP, NULL);
         }
         else
         {
             keybd_event((BYTE)tmp[i]+, NULL, KEYEVENTF_EXTENDEDKEY | , NULL);
             keybd_event((BYTE)tmp[i]+, NULL, KEYEVENTF_EXTENDEDKEY | KEYEVENTF_KEYUP, NULL);
         }
     }
     // 恢复此操作之前的键盘状态
     MySetKeyBig(bOldState);
     free(tmp);
 }