Inserts all pages of the specified Leadtools.RasterImage into another Leadtools.RasterImage.
returnImage
The Leadtools.RasterImage will contain the result of the merge.
originalImage
The Leadtools.RasterImage to be merged with the returnImage
This method appends the pages from the original image to the resulting image.
If the returnImage is NULL it will be initialized with the originalImage.
After this method returns the originalImage will be invalid and disposed.