Loading and Displaying an Image (Visual Basic)

Take the following steps to start a project and to add some code that displays an image on the main form:

1.	Start Visual Basic.
2.	Add the LEAD RasterView Control to your project.
	On the Project pull-down menu, use the Components option, and select the LEAD RasterView Control (14.5).
3.	Add the LEAD Raster Object Library and LEAD Raster Variant Object Library to your project.
	On the Project pull-down menu, use the References option, and select the LEAD Raster Object Library (14.5).
	On the Project pull-down menu, use the References option, and select the LEAD Raster Variant Object Library (14.5).
4.	Add the LEAD RasterIO Object Library to your project.
	On the Project pull-down menu, use the References option, and select the LEAD RasterIO Object Library (14.5).
5.	$image\btnlead.gif$ Select the LEAD RasterView control; then add the control to your main form. Size and position the control as you want it to appear at run time.
6.	$image\btncmd.gif$ Add a command button to your form and name it as follows:
	Name	Caption
	LoadLead	Load Image
7.	Add the following initialization code to the main form's Load procedure. In online help, you can use the Edit pull-down menu to copy the block of code.

Private Sub Form_Load()
  'Set defaults for displaying the image.
  'These are all persistent properties that can be set in the properties box.
  LEADRasterView1.Appearance = RASTERVIEW_APPEARANCE_FLAT
  LEADRasterView1.BorderStyle = 1
  LEADRasterView1.BackColor = RGB(255, 255, 125)
  LEADRasterView1.PaintDither = PAINTDITHER_DIFFUSION
  LEADRasterView1.PaintPalette = PAINTPALETTE_AUTO
  LEADRasterView1.AutoRepaint = True
  LEADRasterView1.AutoSize = False
  LEADRasterView1.AutoSetRects = True
  LEADRasterView1.PaintSizeMode = PAINTSIZEMODE_FIT
End Sub

8.	Code the LoadLead button's click procedure as follows:

Private Sub LoadLead_Click()
Dim RasterIO As New LEADRasterIO
RasterIO.Load LEADRasterView1.Raster, "v:\images\arcade.bmp", 0, 0, 1
End Sub

9.	Run your program to test it.
10.	Save the project be used as a starting point for other tasks in this tutorial.