Public Shared Function ChangeFromWmf( _
   ByVal hwmf As IntPtr, _
   ByVal width As Integer, _
   ByVal height As Integer _
) As RasterImage

Visual Basic (Usage)	Copy Code
Dim hwmf As IntPtr Dim width As Integer Dim height As Integer Dim value As RasterImage   value = RasterImage.ChangeFromWmf(hwmf, width, height)

public static RasterImage ChangeFromWmf( 
   IntPtr hwmf,
   int width,
   int height
)

public:
static RasterImage^ ChangeFromWmf( 
   IntPtr hwmf,
   int width,
   int height
) 

Parameters

hwmf

Handle to the WMF to be changed.

width

Amount by which to scale the metafiles original width.

height

Amount by which to scale the metafiles original height.

Return Value

This example loads a RasterImage, converts it to a WMF, then converts the WMF back to a RasterImage.

Visual Basic

Copy Code

Public Sub ChangeFromWmfExample()    RasterCodecs.Startup()    Dim codecs As New RasterCodecs()    ' Load an image    Dim image As RasterImage = codecs.Load(LeadtoolsExamples.Common.ImagesPath.Path + "Image1.cmp", 24, CodecsLoadByteOrder.BgrOrGray, 1, 1)    ' Change to WMF    Dim hwmf As IntPtr = image.ChangeToWmf()    image.Dispose()    ' Convert the WMF back to a RasterImage preserving the size    image = RasterImage.ChangeFromWmf(hwmf, 0, 0)    ' Save it to disk    codecs.Save(image, LeadtoolsExamples.Common.ImagesPath.Path + "Image1_ChangeFromWmf.bmp", RasterImageFormat.Bmp, 24)    image.Dispose()    ' Clean up    codecs.Dispose()    RasterCodecs.Shutdown() End Sub

C#

Copy Code

public void ChangeFromWmfExample()  {     RasterCodecs.Startup();     RasterCodecs codecs = new RasterCodecs();       // Load an image     RasterImage image = codecs.Load(LeadtoolsExamples.Common.ImagesPath.Path + "Image1.cmp", 24, CodecsLoadByteOrder.BgrOrGray, 1, 1);       // Change to WMF     IntPtr hwmf = image.ChangeToWmf();     image.Dispose();       // Convert the WMF back to a RasterImage preserving the size     image = RasterImage.ChangeFromWmf(hwmf, 0, 0);       // Save it to disk     codecs.Save(image, LeadtoolsExamples.Common.ImagesPath.Path + "Image1_ChangeFromWmf.bmp", RasterImageFormat.Bmp, 24);       image.Dispose();       // Clean up     codecs.Dispose();     RasterCodecs.Shutdown();  }

If this function is successful, hwmf is freed.

The metafile can be loaded at the original dimension or scaled by using the width and height parameters.

If width == 0 and height == 0 - the metafile is loaded at the size present in the file.

If width == 0 and height > 0 - the metafile is stretched so that it has the height height (preserving the aspect ratio).

If width > 0 and height == 0 - the metafile is stretched so that it has the width width (preserving the aspect ratio).

If width > 0 and height > 0 - the metafile is stretched so that it has the width width and height height (the aspect ratio is ignored).

This function does not support signed images.

Target Platforms: Microsoft .NET Framework 3.0, Windows XP, Windows Server 2003 family, Windows Server 2008 family

Reference