This sample program, PXR_VB_NET_OFFSET_GAIN, illustrates the use of the Imagenation PXR800 with
the new programming language Visual Basic .NET. It shows you how to use the Offset and Gain features of the PXR800. In this sample
we use Windows scroll bars to let you control the offset and gain, but in your application, you might use different types of controls.
Nonetheless, the use of the offset and gain functions is the same regardless of the method used for control.
The functions used in this sample are:
GetFineGain()
SetFineGain()
GetOffset()
SetOffset()
Whether you use our sample as a starting point or not, you will need the interface file contained in
this package if you want to work in Visual Basic .NET.
This is what you need for Visual Basic .NET development:
In order to develop a Visual Basic .NET application for the PXR800, you
need to have an interface file that redefines all of the PXR800 functions and links the new definitions
to the existing PXR800 DLLs.
This is what we are giving you in this package:
The interface file containing the following three types of data:
| 1. | The DLL function redefinitions - Redefines all the functions that
are explained in the the PXR800 Frame Grabber User's Guide and contained in the PXR800 DLLs. |
2. | Global variable definitions – A set of common static variable names used by the PXR800 API. |
3. | Display Form - Some useful functions for displaying images. You may want to use these functions in your own application to to avoid building them from scratch.
|
A sample Visual Basic .NET program that illustrates the following concepts:
| 1. | Library initialization - Proper initialization of the PXR800 libraries. |
2. | Display - Done by getting a pointer to the acquired image using the
PXR800 FrameBuffer() function and then creating a bitmap by calling the Bitmap() function. |
3. | Continuous image update - Uses a timer to cause the image window to be continuously updated.
|
4. | Gain and offset control - Change and retrieve (set and get) gain and offset values.
|
This is how you use it:
Download this package into a directory where you want to work.
Unzip it into that same directory. Build the sample and execute it to make sure it works. Then modify it for your
application. If you are building a new Visual Basic .NET application, you might want to start with our sample code. If you already have an application that you are porting, you may just want to use our interface
file.
