What is a Hot Key Control
A hot key is a key combination that the user can press to perform an action quickly. For example, a user can create a hot key that activates a given window and brings it to the top of the z-order. The hot key control displays the user's choices and ensures that the user selects a valid key combination. Here's the code below on how to create a hot key control.
A hot key is a key combination that the user can press to perform an action quickly. For example, a user can create a hot key that activates a given window and brings it to the top of the z-order. The hot key control displays the user's choices and ensures that the user selects a valid key combination. Here's the code below on how to create a hot key control.
Declare Function SendMessage Lib "user32" Alias _
"SendMessageA" (ByVal hwnd As Long, _
ByVal wMsg As Long, ByVal wParam As Long, _
lParam As Long) As Long
Declare Function DefWindowProc Lib "user32" _
Alias "DefWindowProcA" (ByVal hwnd As Long, _
ByVal wMsg As Long, ByVal wParam As Long, _
ByVal lParam As Long) As Long
Public Const WM_SETHOTKEY = &H32
Public Const WM_SHOWWINDOW = &H18
Public Const HK_SHIFTA = &H141 'Shift + A
Public Const HK_SHIFTB = &H142 'Shift * B
Public Const HK_CONTROLA = &H241 'Control + A
Public Const HK_ALTZ = &H45A
'The value of the key-combination has to
'declared in lowbyte/highbyte-format
'That means as a hex-number: the last two
'characters specify the lowbyte (e.g.: 41 = a),
'the first the highbyte (e.g.: 01 = 1 = Shift)
Private Sub Form_Load()
Me.WindowState = vbMinimized
'Let windows know what hotkey you want for
'your app, setting of lParam has no effect
erg& = SendMessage(Me.hwnd, WM_SETHOTKEY, _
HK_ALTZ, 0)
'Check if succesfull
If erg& <> 1 Then
MsgBox "You need another hotkey", vbOKOnly, _
"Error"
End If
'Tell windows what it should do, when the hotkey
'is pressed -> show the window!
'The setting of wParam and lParam has no effect
erg& = DefWindowProc(Me.hwnd, WM_SHOWWINDOW, _
0, 0)
End Sub
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