RIGOL  Chapter 4 Programming Demos 
4-12  DP800 Programming Guide 
Visual Basic Programming Demo 
 
The program used in this demo: Visual Basic 6.0 
 
The function realized in this demo: enable the three channels of the power supply and show the colors 
of the channels.   
 
1  Build a standard application program project (Standard EXE) and name it as DP800_Demo_VB. 
 
2  Click the Existing tab of ProjectAdd Module. Search for the visa32.bas file in the include folder 
under the NI-VISA installation path and add the file. 
 
 
3  Add three CommandButton controls to represent CH1, CH2 and CH3 respectively. Add three Text 
controls (Label1(0), Label1(1) and Label1(2)) to represent the status of the three channels 
respectively (by default, the Text control is gray; when the channel is enabled, it displays the color of 
the channel). The layout of the controls is as shown in the figure below.  
 
 
4  Open the General tab in Project→Project1 Properties and select Form1 in the Startup Object 
dropdown box.  
 
5  Double-click CH1 to enter the programming environment. Add the following codes to control CH1, CH2 
and CH3. The codes of CH1 are as shown below; the codes of CH2 and CH3 are similar.  
 
Dim defrm As Long 
 Dim vi As Long 
 Dim strRes As String * 200 
 Dim list As Long