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如何模拟多媒体按键（C语言）？

发布于 2024-09-04 06:56:43 字数 100 浏览 9 评论 0原文

现代键盘具有特殊的多媒体键，例如“暂停/播放”或“打开网络浏览器”。是否可以编写一个“按下”这些键的程序？

我更喜欢 C 语言的解决方案，但我也接受与语言无关的解决方案。

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薆情海 2024-09-11 06:56:43

如果您正在谈论 Win32 下的编程，请使用 SendInput Windows API。

您需要构建 INPUT 结构，将类型成员设置为 INPUT_KEYBOARD。在 ki 成员（KEYBDINPUT 类型）中，您可以将 vk（虚拟密钥）设置为您所需的 VK 代码（例如，VK_MEDIA_NEXT_TRACK、VK_MEDIA_STOP）。

虚拟键代码：http://msdn.microsoft。 com/en-us/library/dd375731(v=VS.85).aspx

SendInput 函数：http://msdn.microsoft.com/en-us/library/ms646310(v=VS.85).aspx

我尚未测试以下内容，但应该是这样的：

KEYBDINPUT kbi;
kbi.wVk = VK_MEDIA_STOP; // Provide your own
kbi.wScan = 0;
kbi.dwFlags = 0;  // See docs for flags (mm keys may need Extended key flag)
kbi.time = 0;
kbi.dwExtraInfo = (ULONG_PTR) GetMessageExtraInfo();

INPUT input;
input.type = INPUT_KEYBOARD;
input.ki   = kbi;

SendInput(1, &input, sizeof(INPUT));

Use the SendInput Windows API, if you are talking about programming under Win32.

You need to build INPUT structures, setting the type member to INPUT_KEYBOARD. In the ki member (KEYBDINPUT type), you can set vk (virtual key) to your desired VK code (for example, VK_MEDIA_NEXT_TRACK, VK_MEDIA_STOP).

Virtual key codes: http://msdn.microsoft.com/en-us/library/dd375731(v=VS.85).aspx

SendInput Function: http://msdn.microsoft.com/en-us/library/ms646310(v=VS.85).aspx

I've not tested the following, but should be like this:

KEYBDINPUT kbi;
kbi.wVk = VK_MEDIA_STOP; // Provide your own
kbi.wScan = 0;
kbi.dwFlags = 0;  // See docs for flags (mm keys may need Extended key flag)
kbi.time = 0;
kbi.dwExtraInfo = (ULONG_PTR) GetMessageExtraInfo();

INPUT input;
input.type = INPUT_KEYBOARD;
input.ki   = kbi;

SendInput(1, &input, sizeof(INPUT));

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冷︶言冷语的世界 2024-09-11 06:56:43

比接受的答案更容易的是 keybd_event。 没有结构，只是带有数字参数的调用。

// C# example:
public const int KEYEVENTF_EXTENDEDKEY = 1;
public const int KEYEVENTF_KEYUP = 2;
public const int VK_MEDIA_NEXT_TRACK = 0xB0;
public const int VK_MEDIA_PLAY_PAUSE = 0xB3;
public const int VK_MEDIA_PREV_TRACK = 0xB1;

[DllImport("user32.dll", SetLastError = true)]
public static extern void keybd_event(byte virtualKey, byte scanCode, uint flags, IntPtr extraInfo);

keybd_event(VK_MEDIA_PREV_TRACK, 0, KEYEVENTF_EXTENDEDKEY, IntPtr.Zero);

Even more easier than the accepted answer is keybd_event. No structs just a call with numeric parameters.

// C# example:
public const int KEYEVENTF_EXTENDEDKEY = 1;
public const int KEYEVENTF_KEYUP = 2;
public const int VK_MEDIA_NEXT_TRACK = 0xB0;
public const int VK_MEDIA_PLAY_PAUSE = 0xB3;
public const int VK_MEDIA_PREV_TRACK = 0xB1;

[DllImport("user32.dll", SetLastError = true)]
public static extern void keybd_event(byte virtualKey, byte scanCode, uint flags, IntPtr extraInfo);

keybd_event(VK_MEDIA_PREV_TRACK, 0, KEYEVENTF_EXTENDEDKEY, IntPtr.Zero);

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