Public Shared Function ChangeFromEmf( _
   ByVal hemf As IntPtr, _
   ByVal width As Integer, _
   ByVal height As Integer _
) As RasterImage

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

public static RasterImage ChangeFromEmf( 
   IntPtr hemf,
   int width,
   int height
)

public:
static RasterImage^ ChangeFromEmf( 
   IntPtr hemf,
   int width,
   int height
) 

Parameters

hemf

Handle to the EMF to be changed.

width

Amount by which to scale the enhanced metafile's original width.

height

Amount by which to scale the enhanced metafile's original height.

Return Value

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

Visual Basic

Copy Code

Public Sub ChangeFromEmfExample()    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 EMF    Dim hemf As IntPtr = image.ChangeToEmf()    image.Dispose()    ' Convert the EMF back to a RasterImage preserving the size    image = RasterImage.ChangeFromEmf(hemf, 0, 0)    ' Save it to disk    codecs.Save(image, LeadtoolsExamples.Common.ImagesPath.Path + "Image1_ChangeToEmf.bmp", RasterImageFormat.Bmp, 24)    image.Dispose()    ' Clean up    codecs.Dispose()    RasterCodecs.Shutdown() End Sub

C#

Copy Code

public void ChangeFromEmfExample()  {     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 EMF     IntPtr hemf = image.ChangeToEmf();     image.Dispose();       // Convert the EMF back to a RasterImage preserving the size     image = RasterImage.ChangeFromEmf(hemf, 0, 0);       // Save it to disk     codecs.Save(image, LeadtoolsExamples.Common.ImagesPath.Path + "Image1_ChangeToEmf.bmp", RasterImageFormat.Bmp, 24);       image.Dispose();       // Clean up     codecs.Dispose();     RasterCodecs.Shutdown();  }

If this function is successful, hemf is freed.

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

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

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

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

If width > 0 and height > 0 - the enhanced 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