deathman5
asked on
HotKeys
hey,
check this code, it never seem to work, what ever I click (ctrl-K or ctrl-F) the form will be maximized...
why?
[CODE]
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 ProcessMessage()
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 = vbMaximized
End If
'let the operating system process other events
DoEvents
Loop
End Sub
Private Sub Form_Unload(Cancel As Integer)
bCancel = True
'unregister hotkey
Call UnregisterHotKey(Me.hWnd, &HBFFF&)
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
Dim rett As Long
bCancel = False
'register the Ctrl-F hotkey
rett = RegisterHotKey(Me.hWnd, &HBFFB&, MOD_CONTROL, vbKeyK)
'show some information
Me.AutoRedraw = True
Me.Print "Press CTRL-K to max this form"
'show the form and
Show
'process the Hotkey messages
ProcessMessage
End Sub
[/CODE]
check this code, it never seem to work, what ever I click (ctrl-K or ctrl-F) the form will be maximized...
why?
[CODE]
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 ProcessMessage()
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 = vbMaximized
End If
'let the operating system process other events
DoEvents
Loop
End Sub
Private Sub Form_Unload(Cancel As Integer)
bCancel = True
'unregister hotkey
Call UnregisterHotKey(Me.hWnd, &HBFFF&)
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
Dim rett As Long
bCancel = False
'register the Ctrl-F hotkey
rett = RegisterHotKey(Me.hWnd, &HBFFB&, MOD_CONTROL, vbKeyK)
'show some information
Me.AutoRedraw = True
Me.Print "Press CTRL-K to max this form"
'show the form and
Show
'process the Hotkey messages
ProcessMessage
End Sub
[/CODE]
ASKER CERTIFIED SOLUTION
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deathman5,
try the solution i provided in the url:
https://www.experts-exchange.com/questions/20738177/KEYPRESS-question.html
cheers,
srimanth.
try the solution i provided in the url:
https://www.experts-exchange.com/questions/20738177/KEYPRESS-question.html
cheers,
srimanth.
ASKER
thx all of you, all the answers were good but the accepted one was easiest & does the job
thx alot Idle_Mind & all of you
:)
--> sorry but I cant split points <--
thx alot Idle_Mind & all of you
:)
--> sorry but I cant split points <--
1.) In the Form_Load() event, you're calling the ProcessMessages() sub which is basically an eternal loop. Because of that, anything after ProcessMessages() will not get processed in Form_Load() since it waits for the ProcessMessages() to finish. This means you'll never register the 2nd hot-key.
2.) The ProcessMessages() sub waits for a Window Message and checks if it's a Hot-Key window message (WM_HOTKEY). If it is, it will maximize the form (WindowState = vbMaximized). That method of peeking for the WM_HOTKEY message doesn't show you how to check for the hot-key identifier to distinguish between additionally registered hot-keys. You can do it via the Message (Msg) type.
3.) You're registering hot-keys with manually specified IDs. If the ID is already in use, the function will fail. You should use GlobalAtomAdd/Delete to return unique long values to use.
4.) And other issues..
I suggest sub-classing the form associated with the hot-key for the WM_HOTKEY messages. The hot-key identifier will be passed in one of the parameters. Might be complicated for you to implement so I did a search:
https://www.experts-exchange.com/questions/20785060/KeyPress-problem.html