Programming Guide for DS1000E, DS1000D Series
3-7
Program in Visual Basic 6.0
Example 1: Query and set the channel status
This example shows you how to create a Demo to query or set the channel status.
Open Visual Basic 6.0, take the following steps:
1.
Create a
Standard EXE
project and copy the Dynamic Link Library
RigolTMCUsb_UI.dll
from
Demo files
into the new project for later use.
2.
Named Form1 “
Demo
”. Then add three
CommandButtons
(CH1, CH2 and
MATH) and three
Labels
for showing the status of these buttons respectively
(the label colour varies with the channel status, that is, when the channel is on,
the label shows relative colour; on the contrary, if the channel is off, the colour
of label will be gray), see the figure below:
3.
Enter into the programming environment, then, quote the functions
(
ReadUSB,WriteUSB,GetTMCDeviceNum
) in the Dynamic Link Library
RigolTMCUsb_UI.dll
and add the following codes in the area of project code:
Private Declare Function ReadUSB Lib "RigolTMCUsb_UI.dll" (ByVal Index As
Long, ByVal lpszLength As Long, ByVal lpszBuffer As Long) As Boolean
Private Declare Function WriteUSB Lib "RigolTMCUsb_UI.dll" (ByVal Index As
Long, ByVal msgid As Long, ByVal tag As Long, ByVal length As Long, ByVal
lpszBuffer As Long) As Boolean
Private Declare Function GetDeviceNum Lib "RigolTMCUsb_UI.dll" () As Long
