@msdn=http://search.microsoft.com/search/results.aspx?qu=$$$ @pinvoke=http://pinvoke.net/$$$.htm Summary: The InvertRect API !!!!C# Signature: [DllImport("user32.dll")] static extern bool InvertRect(IntPtr hDC, [In] ref RECT lprc); !!!!VB Signature: Public Declare Function InvertRect Lib "user32" Alias "InvertRect" (ByVal hdc As Integer, <MarshalAs(UnmanagedType.Struct)> ByRef lpRect As RECT) As Integer <StructLayout(LayoutKind.Sequential)> Public Structure RECT Public Left As Integer Public Top As Integer Public Right As Integer Public Bottom As Integer End Structure !!!!User-Defined Types: None. !!!!Notes: None. !!!!Tips & Tricks: Please add some! !!!!Sample Code: !!!!!VB.NET Public Overrides Sub draw(ByVal g As System.Drawing.Graphics, ByVal gc As GlyphContext) MyBase.draw(g, gc) '绘原图 '绘制选择的部份 '翻转 If Selection.poStatus <> Selection.EnumSelection.NoSelection Then Dim hdc As IntPtr = g.GetHdc() Dim loSelected As RECT loSelected.Left = Selection.poArea.Left loSelected.Top = Selection.poArea.Top loSelected.Right = Selection.poArea.Right loSelected.Bottom = Selection.poArea.Bottom InvertRect(hdc.ToInt32, loSelected) ' Release handle to device context. g.ReleaseHdc(hdc) End If End Sub Please add some! !!!!Alternative Managed API: Do you know one? Please contribute it! Documentation: InvertRect@msdn on MSDN
Edit user32.invertrect
You do not have permission to change this page. If you feel this is in error, please send feedback with the contact link on the main page.