'控制窗体最小限定的代码
'新建一个标准模块.
'代码如下
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 Sub CopyMemory Lib "KERNEL32" Alias "RtlMoveMemory" ( _
lpvDest As Any, lpvSource As Any, ByVal cbCopy As Long)
Public Const GWL_WNDPROC = (-4)
Public Const WM_GETMINMAXINFO = &H24
Type POINTAPI
X As Long
Y As Long
End Type
Type MINMAXINFO
ptReserved As POINTAPI
ptMaxSize As POINTAPI
ptMaxPosition As POINTAPI
ptMinTrackSize As POINTAPI
ptMaxTrackSize As POINTAPI
End Type
Public preWinProc As Long
Public Function wndproc(ByVal hWnd As Long, ByVal Msg As Long, _
ByVal wParam As Long, ByVal lParam As Long) As Long
Dim lwd As Long, hwd As Long
If Msg = WM_GETMINMAXINFO Then
Dim maxmin As MINMAXINFO
CopyMemory maxmin, ByVal lParam, Len(maxmin)
'maxmin.ptMaxTrackSize.x = 500 '设定最大Resize的宽度
'maxmin.ptMaxTrackSize.y = 400 '设定最大Resize的高度
maxmin.ptMinTrackSize.X = 800 '设定最小Resize的宽度
maxmin.ptMinTrackSize.Y = 600 '设定最小Resize的高度
CopyMemory ByVal lParam, maxmin, Len(maxmin)
Else
wndproc = CallWindowProc(preWinProc, hWnd, Msg, wParam, lParam)
End If
End Function
在form load里写
'控制窗体最小限定的代码
Dim ret As Long
preWinProc = GetWindowLong(Me.hWnd, GWL_WNDPROC)
ret = SetWindowLong(Me.hWnd, GWL_WNDPROC, AddressOf wndproc)
'控制窗体最小限定的代码
在unload里写
'控制窗体最小限定的代码
Dim ret As Long
ret = SetWindowLong(Me.hWnd, GWL_WNDPROC, preWinProc)
'控制窗体最小限定的代码