我参考这篇文章;
http://www.pinvoke.net/default.aspx/user32/RegisterHotKey.html
#region fields
public static int MOD_ALT = 0x1;
public static int MOD_CONTROL = 0x2;
public static int MOD_SHIFT = 0x4;
public static int MOD_WIN = 0x8;
public static int WM_HOTKEY = 0x312;
#endregion
[DllImport("user32.dll")]
private static extern bool RegisterHotKey(IntPtr hWnd, int id, int fsModifiers, int vlc);
[DllImport("user32.dll")]
private static extern bool UnregisterHotKey(IntPtr hWnd, int id);
private static int keyId;
public static void RegisterHotKey(Form f, Keys key)
{
int modifiers = 0;
if ((key & Keys.Alt) == Keys.Alt)
modifiers = modifiers | WindowsShell.MOD_ALT;
if ((key & Keys.Control) == Keys.Control)
modifiers = modifiers | WindowsShell.MOD_CONTROL;
if ((key & Keys.Shift) == Keys.Shift)
modifiers = modifiers | WindowsShell.MOD_SHIFT;
Keys k = key & ~Keys.Control & ~Keys.Shift & ~Keys.Alt;
Func ff = delegate()
{
keyId = f.GetHashCode(); // this should be a key unique ID, modify this if you want more than one hotkey
RegisterHotKey((IntPtr)f.Handle, keyId, modifiers, (int)k);
};
f.Invoke(ff); // this should be checked if we really need it (InvokeRequired), but it's faster this way
}
我的问题是,api如何RegisterHotKey
知道 , 1
, 2
,4
是8
Windows 键?因为 ctrl、shift 和 menu (alt) 的键码会返回完全不同的键值?RegisterHotKey
以及它正在检查的函数中到底发生了什么:
if ((key & Keys.Control) == Keys.Control)
modifiers = modifiers | WindowsShell.MOD_CONTROL;
它在这里做什么?
Keys k = key & ~Keys.Control & ~Keys.Shift & ~Keys.Alt;