本文整理汇总了VB.NET中System.Drawing.Graphics.GetHalftonePalette方法的典型用法代码示例。如果您正苦于以下问题：VB.NET Graphics.GetHalftonePalette方法的具体用法？VB.NET Graphics.GetHalftonePalette怎么用？VB.NET Graphics.GetHalftonePalette使用的例子？那么恭喜您, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类System.Drawing.Graphics的用法示例。
在下文中一共展示了Graphics.GetHalftonePalette方法的1个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的VB.NET代码示例。
示例1: GetHalftonePaletteVoid
<System.Runtime.InteropServices.DllImportAttribute("gdi32.dll")> _
Private Shared Function SelectPalette(ByVal hdc As IntPtr, _
ByVal htPalette As IntPtr, ByVal bForceBackground As Boolean) As IntPtr
End Function
<System.Runtime.InteropServices.DllImportAttribute("gdi32.dll")> _
Private Shared Function RealizePalette(ByVal hdc As IntPtr) As Integer
End Function
<System.Security.Permissions.SecurityPermission( _
System.Security.Permissions.SecurityAction.LinkDemand, Flags:= _
System.Security.Permissions.SecurityPermissionFlag.UnmanagedCode)> _
Private Sub GetHalftonePaletteVoid(ByVal e As PaintEventArgs)
' Create and draw image.
Dim imageFile As Image = Image.FromFile("SampImag.jpg")
e.Graphics.DrawImage(imageFile, New Point(0, 0))
' Get handle to device context.
Dim hdc As IntPtr = e.Graphics.GetHdc()
' Get handle to halftone palette.
Dim htPalette As IntPtr = Graphics.GetHalftonePalette()
' Select and realize new palette.
SelectPalette(hdc, htPalette, True)
RealizePalette(hdc)
' Create new graphics object.
Dim newGraphics As Graphics = Graphics.FromHdc(hdc)
' Draw image with new palette.
newGraphics.DrawImage(imageFile, 300, 0)
' Release handle to device context.
e.Graphics.ReleaseHdc(hdc)
End Sub