C/C++使用keybd_event模拟键盘按键

 1 #include <stdio.h>
 2 #include <Windows.h>
 3 
 4 /*
 5     设置键盘大小写状态
 6     big:为TRUE则切换大写状态,否则切换小写状态
 7 */
 8 VOID MySetKeyBig(BOOL big = FALSE);
 9 
10 /*
11     模拟键盘按键，支持大小写
12     str:需要按出的字符串
13 */
14 VOID MyAnalogKey(char *str);
15 
16 int main(void)
17 {
18     // 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
19     Sleep(1500);
20     MyAnalogKey("Love life,Love BiaoGe.0123456789");
21     system("pause");
22     return 0;
23 }
24 
25 VOID MySetKeyBig(BOOL big)
26 {
27     // 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
28     if (GetKeyState(VK_CAPITAL))
29     {
30         // 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
31         if (!big)
32         {
33             keybd_event(VK_CAPITAL, NULL, KEYEVENTF_EXTENDEDKEY | 0, NULL);
34             keybd_event(VK_CAPITAL, NULL, KEYEVENTF_EXTENDEDKEY | KEYEVENTF_KEYUP, NULL);
35         }
36     }
37     else
38     {
39         // 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
40         if (big)
41         {
42             keybd_event(VK_CAPITAL, NULL, KEYEVENTF_EXTENDEDKEY | 0, NULL);
43             keybd_event(VK_CAPITAL, NULL, KEYEVENTF_EXTENDEDKEY | KEYEVENTF_KEYUP, NULL);
44         }
45     }
46 }
47 
48 VOID MyAnalogKey(char *str)
49 {
50     int iLen = 0;
51     char *tmp = NULL;
52     INPUT *keys = NULL;
53     BOOL bOldState = FALSE;
54 
55     // 保存此操作前的键盘状态
56     bOldState = (BOOL)GetKeyState(VK_CAPITAL);
57     iLen = lstrlen(str);
58     tmp = (char *)malloc(iLen);
59     memmove(tmp, str, iLen);
60     for (int i = 0; i < iLen; i++)
61     {
62         // 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
63         if (tmp[i] == ' ')
64         {
65             // 产生一个击键消息步骤:按下->抬起
66             keybd_event(VK_SPACE, NULL, KEYEVENTF_EXTENDEDKEY | 0, NULL);
67             keybd_event(VK_SPACE, NULL, KEYEVENTF_EXTENDEDKEY | KEYEVENTF_KEYUP, NULL);
68         }
69         else if (tmp[i] == ',')
70         {
71             keybd_event(VK_OEM_COMMA, NULL, KEYEVENTF_EXTENDEDKEY | 0, NULL);
72             keybd_event(VK_OEM_COMMA, NULL, KEYEVENTF_EXTENDEDKEY | KEYEVENTF_KEYUP, NULL);
73         }
74         else if (tmp[i] >= 'a' && tmp[i] <= 'z')
75         { // 根据字符大小写切换键盘大小写状态
76             MySetKeyBig(0);
77             // keybd_event只识别大写
78             keybd_event((BYTE)tmp[i]-32, NULL, KEYEVENTF_EXTENDEDKEY | 0, NULL);
79             keybd_event((BYTE)tmp[i]-32, NULL, KEYEVENTF_EXTENDEDKEY | KEYEVENTF_KEYUP, NULL);
80         }
81         else if ((tmp[i] >= 'A' && tmp[i] <= 'Z') || (tmp[i] >= '0' && tmp[i] <= '9'))
82         {
83             MySetKeyBig(1);
84             keybd_event((BYTE)tmp[i], NULL, KEYEVENTF_EXTENDEDKEY | 0, NULL);
85             keybd_event((BYTE)tmp[i], NULL, KEYEVENTF_EXTENDEDKEY | KEYEVENTF_KEYUP, NULL);
86         }
87         else
88         {
89             keybd_event((BYTE)tmp[i]+64, NULL, KEYEVENTF_EXTENDEDKEY | 0, NULL);
90             keybd_event((BYTE)tmp[i]+64, NULL, KEYEVENTF_EXTENDEDKEY | KEYEVENTF_KEYUP, NULL);
91         }
92     }
93     // 恢复此操作之前的键盘状态
94     MySetKeyBig(bOldState);
95     free(tmp);
96 }