C/C++使用keybd_event模擬鍵盤按鍵

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

/*
    設置鍵盤大小寫狀態
    big:為TRUE則切換大寫狀態,否則切換小寫狀態
*/
VOID MySetKeyBig(BOOL big = FALSE);

/*
    模擬鍵盤按鍵，支持大小寫
    str:需要按出的字符串
*/
VOID MyAnalogKey(char *str);

int main(void)
{
    // 當程序運行1.5s時再執行模擬按鍵，以便選擇需要操作的窗口
    Sleep(1500);
    MyAnalogKey("Love life,Love BiaoGe.0123456789");
    system("pause");
    return 0;
}

VOID MySetKeyBig(BOOL big)
{
    // 判斷鍵盤CapsLock鍵是否開啟狀態,開啟狀態則為大寫,否則為小寫
    if (GetKeyState(VK_CAPITAL))
    {
        // 如果當前鍵盤狀態為大寫,要求改小寫,則模擬按鍵CapsLock切換狀態
        if (!big)
        {
            keybd_event(VK_CAPITAL, NULL, KEYEVENTF_EXTENDEDKEY | 0, NULL);
            keybd_event(VK_CAPITAL, NULL, KEYEVENTF_EXTENDEDKEY | KEYEVENTF_KEYUP, NULL);
        }
    }
    else
    {
        // 如果當前鍵盤狀態為小寫,要求改大寫,則模擬按鍵CapsLock切換狀態
        if (big)
        {
            keybd_event(VK_CAPITAL, NULL, KEYEVENTF_EXTENDEDKEY | 0, NULL);
            keybd_event(VK_CAPITAL, NULL, KEYEVENTF_EXTENDEDKEY | KEYEVENTF_KEYUP, NULL);
        }
    }
}

VOID MyAnalogKey(char *str)
{
    int iLen = 0;
    char *tmp = NULL;
    INPUT *keys = NULL;
    BOOL bOldState = FALSE;

    // 保存此操作前的鍵盤狀態
    bOldState = (BOOL)GetKeyState(VK_CAPITAL);
    iLen = lstrlen(str);
    tmp = (char *)malloc(iLen);
    memmove(tmp, str, iLen);
    for (int i = 0; i < iLen; i++)
    {
        // 某些符號非直屬鍵盤按鍵,這里只過濾轉換兩個,以后用到其它字符自行添加過濾
        if (tmp[i] == ' ')
        {
            // 產生一個擊鍵消息步驟:按下->抬起
            keybd_event(VK_SPACE, NULL, KEYEVENTF_EXTENDEDKEY | 0, NULL);
            keybd_event(VK_SPACE, NULL, KEYEVENTF_EXTENDEDKEY | KEYEVENTF_KEYUP, NULL);
        }
        else if (tmp[i] == ',')
        {
            keybd_event(VK_OEM_COMMA, NULL, KEYEVENTF_EXTENDEDKEY | 0, NULL);
            keybd_event(VK_OEM_COMMA, NULL, KEYEVENTF_EXTENDEDKEY | KEYEVENTF_KEYUP, NULL);
        }
        else if (tmp[i] >= 'a' && tmp[i] <= 'z')
        { // 根據字符大小寫切換鍵盤大小寫狀態
            MySetKeyBig(0);
            // keybd_event只識別大寫
            keybd_event((BYTE)tmp[i]-32, NULL, KEYEVENTF_EXTENDEDKEY | 0, NULL);
            keybd_event((BYTE)tmp[i]-32, NULL, KEYEVENTF_EXTENDEDKEY | KEYEVENTF_KEYUP, NULL);
        }
        else if ((tmp[i] >= 'A' && tmp[i] <= 'Z') || (tmp[i] >= '0' && tmp[i] <= '9'))
        {
            MySetKeyBig(1);
            keybd_event((BYTE)tmp[i], NULL, KEYEVENTF_EXTENDEDKEY | 0, NULL);
            keybd_event((BYTE)tmp[i], NULL, KEYEVENTF_EXTENDEDKEY | KEYEVENTF_KEYUP, NULL);
        }
        else
        {
            keybd_event((BYTE)tmp[i]+64, NULL, KEYEVENTF_EXTENDEDKEY | 0, NULL);
            keybd_event((BYTE)tmp[i]+64, NULL, KEYEVENTF_EXTENDEDKEY | KEYEVENTF_KEYUP, NULL);
        }
    }
    // 恢復此操作之前的鍵盤狀態
    MySetKeyBig(bOldState);
    free(tmp);
}