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控件是可以显示在里面的,你只要加个label,把label的属性设为visualble=fause就行。设置鼠标经过头像的mouseHover和mouseLeave事件,当mouseHover时label的属性visualble=true,当mouseLeave时label的属性visualble=fause即可。窗体的鼠标事件可以设置控件的cursor属性,里面可以选择许多种鼠标图形。 只要是正常的Form都可以改变窗体大小,但是无边框的窗体只能用函数改变或者设置属性,在debug后是不能改变的。拖动窗体需要在窗体的load时间里面写入当鼠标单击不放时的事件即可,不难。
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可以,属性controlBox 为false可以去掉三个按钮,另外还有maximize,minimize 可以分别控制最大化和最小化按钮的显示。
Private Declare Function ReleaseCapture Lib "user32" () As Long
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
Const WM_SYSCOMMAND = H112
Const SC_MOVE = HF010
Const HTCAPTION = 2
Private Sub MoveWindow(ByVal hwnd As Long)
Dim ret As Long
ReleaseCapture
ret = SendMessage(Text1.hwnd, WM_SYSCOMMAND, SC_MOVE + HTCAPTION, 0)
End Sub
Private Sub Text1_MouseDown(Button As Integer, Shift As Integer, X As Single, Y As Single)
MoveWindow hwnd
End Sub
Private Sub Text1_MouseMove(Button As Integer, Shift As Integer, X As Single, Y As Single)
MoveWindow hwnd
End Sub
。net 不用api就行
缩放操作
Function 缩放(ByVal bitmap As Bitmap, ByVal 倍数 As Single) As Bitmap
Dim w As Integer = bitmap.Width * 倍数
Dim h As Integer = bitmap.Height * 倍数
Dim tem As New Bitmap(w, h)
Dim g As Graphics = Graphics.FromImage(tem)
g.DrawImage(bitmap, New Rectangle(0, 0, w, h), New Rectangle(0, 0, bitmap.Width, bitmap.Height), GraphicsUnit.Pixel)
g.Dispose()
Return tem
End Function
鼠标滚轮事件 MouseWheel
MouseEventArgs.Delta 值可以判断滚动方向