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Visual Graph Getting Started - Call Visual Graph Functions

Now we explain how to call Visual Graph functions through a VB6 example.

1. Create a new file in Visual Graph IDE, click Program -> Add function menu item and fill the opened dialog box as below:

Call Visual Graph Functions 1

Please note that the function Type must be set as Public to let other programming languages to access it.

2. Paste the following code to AddCircles function:

i = 0
while i < Col
j = 0
while j < Row
d = AddUnit( 0, "circle" )
d.SetBounds( 10 * i, 10 * j, 10, 10 )
j = j + 1
i = i + 1
return UnitCount

3. Save current file as h:\test.tbl

4. Create a new project in VB6, right-click on Toolbox and select Components, and then check Visual Graph ActiveX Control and click <OK>.

5. Click vgctrl in Toolbox, and then draw an instance on Form1.

6. Double-click Form1 and write the following code in Form_Load event:

Dim col, row, n As Integer
vgctrl1.Design "h:\test.tbl"
col = 10
row = 5
n ="return AddCircles( " & CStr(col) & "," + CStr(row) & " )") MsgBox CStr(n)

7. Run this project, you will get a message box with 50 prompt, indicates there are 50 circles generated.

8. If you do not need the return value or this function has not return value, just call AddCircles function like this: "AddCircles( " & cstr( col ) & ", " + CStr( row ) + " )"

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