注册了系统热键，用什么方法激活热键最好？(用Timer和死循环就不要了)
我用 RegisterHotKey 注册了系统热键
看了一些代码，觉得感觉不是很好，用的是死循环来监视热键，例如
这个就是用死循环，加了个DoEvents，防止CPU100%,或者是用了Timer控件的
Private Const MOD_ALT = &H1
Private Const MOD_CONTROL = &H2
Private Const MOD_SHIFT = &H4
Private Const PM_REMOVE = &H1
Private Const WM_HOTKEY = &H312
Private Type POINTAPI
x As Long
y As Long
End Type
Private Type Msg
hWnd As Long
Message As Long
wParam As Long
lParam As Long
time As Long
pt As POINTAPI
End Type
Private Declare Function RegisterHotKey Lib "user32 " (ByVal hWnd As Long, ByVal id As Long, ByVal fsModifiers As Long, ByVal vk As Long) As Long
Private Declare Function UnregisterHotKey Lib "user32 " (ByVal hWnd As Long, ByVal id As Long) As Long
Private Declare Function PeekMessage Lib "user32 " Alias "PeekMessageA " (lpMsg As Msg, ByVal hWnd As Long, ByVal wMsgFilterMin As Long, ByVal wMsgFilterMax As Long, ByVal wRemoveMsg As Long) As Long
Private Declare Function WaitMessage Lib "user32 " () As Long
Private bCancel As Boolean
Private Sub ProcessMessages()
Dim Message As Msg
'loop until bCancel is set to True
Do While Not bCancel
'wait for a message
WaitMessage
'check if it 's a HOTKEY-message
If PeekMessage(Message, Me.hWnd, WM_HOTKEY, WM_HOTKEY, PM_REMOVE) Then
'minimize the form
WindowState = vbMinimized
End If
'let the operating system process other events
DoEvents
Loop
End Sub
Private Sub Form_Load()
Dim ret As Long
bCancel = False
'register the Ctrl-F hotkey
ret = RegisterHotKey(Me.hWnd, &HBFFF&, MOD_CONTROL, vbKeyF)
'show some information
Me.AutoRedraw = True
Me.Print "Press CTRL-F to minimize this form "
'show the form and
Show
'process the Hotkey messages
ProcessMessages
End Sub
Private Sub Form_Unload(Cancel As Integer)
bCancel = True
'unregister hotkey
Call UnregisterHotKey(Me.hWnd, &HBFFF&)
End Sub
'//第2个示例
'演示怎样设置一个窗口在桌面上的HotKey,这个程序将Form1的HotKey设置为
'Ctl+Alt+A.
Private Declare Function SendMessage Lib "user32 " Alias "SendMessageA " (ByVal hwnd As Long, ByVal wMsg As Long, ByVal wParam As Long, lParam As Any) As Long
Private Const WM_SETHOTKEY = &H32
Private Const HOTKEYF_SHIFT = &H1
Private Const HOTKEYF_CONTROL = &H2
Private Const HOTKEYF_ALT = &H4
Private Sub Form_Load()
Dim l As Long
Dim wHotkey As Long
wHotkey = (HOTKEYF_ALT Or HOTKEYF_CONTROL) * (2 ^ 8) + 65
l = SendMessage(Me.hwnd, WM_SETHOTKEY, wHotkey, 0)
End Sub
有没有更好的方法呢？？？？？
用键盘钩子，好像可以，但我下载的键盘钩子的代码很多，担心里面可能隐含什么错误~~
高手出招吧~~~~~~~~~~~
[解决办法]
注册热键的函数，放在模块中：
Option Explicit
Declare Function SetWindowLong Lib "User32 " Alias "SetWindowLongA " (ByVal hwnd As Long, ByVal nIndex As Long, ByVal dwNewLong As Long) As Long
Declare Function GetWindowLong Lib "User32 " Alias "GetWindowLongA " (ByVal hwnd As Long, ByVal nIndex As Long) As Long
Declare Function CallWindowProc Lib "User32 " Alias "CallWindowProcA " (ByVal lpPrevWndFunc As Long, ByVal hwnd As Long, ByVal Msg As Long, ByVal wParam As Long, ByVal lParam As Long) As Long
Declare Function RegisterHotKey Lib "User32 " (ByVal hwnd As Long, ByVal id As Long, ByVal fsModifiers As Long, ByVal vk As Long) As Long
Declare Function UnregisterHotKey Lib "User32 " (ByVal hwnd As Long, ByVal id As Long) As Long
Public Const WM_HOTKEY = &H312
Public Const MOD_ALT = &H1
Public Const MOD_CONTROL = &H2
Public Const MOD_SHIFT = &H4
Public Const GWL_WNDPROC = (-4)
Public preWinProc As Long
Public Modifiers As Long, uVirtKey As Long, idHotKey As Long
Private Type taLong
ll As Long
End Type
Private Type t2Int
lWord As Integer
hWord As Integer
End Type
Public Function Wndproc(ByVal hwnd As Long, ByVal Msg As Long, ByVal wParam As Long, ByVal lParam As Long) As Long
If Msg = WM_HOTKEY Then
If wParam = idHotKey Then
Dim lp As taLong, i2 As t2Int
lp.ll = lParam
LSet i2 = lp
If (i2.lWord = Modifiers) And i2.hWord = uVirtKey Then
Shell "Notepad ", vbNormalFocus
End If
End If
End If
'如果不是热键信息则调用原来的程序
Wndproc = CallWindowProc(preWinProc, hwnd, Msg, wParam, lParam)
End Function
使用，放在窗体中：
Option Explicit
Private Sub Form_Load()
Dim ret As Long
'记录原来的window程序地址
preWinProc = GetWindowLong(Me.hwnd, GWL_WNDPROC)
'用自定义程序代替原来的window程序
ret = SetWindowLong(Me.hwnd, GWL_WNDPROC, AddressOf Wndproc)
idHotKey = 1
Modifiers = MOD_ALT + MOD_CONTROL 'Alt+Ctrl 键
uVirtKey = vbKeyG 'G键
ret = RegisterHotKey(Me.hwnd, idHotKey, Modifiers, uVirtKey)
End Sub
Private Sub Form_Unload(Cancel As Integer)
Dim ret As Long
'取消Message的截取，使之送往原来的windows程序
ret = SetWindowLong(Me.hwnd, GWL_WNDPROC, preWinProc)
Call UnregisterHotKey(Me.hwnd, uVirtKey)
End Sub
