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50 Technical Features
Getting Started
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Visual Graph Getting Started
Use VG Component in Delphi 6
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Use Graphic Library
Change Element's Shape
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Make Graphic Button
Get the Selected Elements
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Movable Label
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Access Properties
Use Line Vertexes
Call Windows API Functions
Call Visual Graph Functions
Callback Control Event in Script
Drag Graph in Run Mode
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Visual Graph Getting Started - Call Windows API Functions

Though Visual Graph is a graphic platform, but it can call Windows API functions also. Now we explain how to do this through playing sound.

1. Create a new file in Visual Graph IDE.

2. Double-click OnLoad event in the Functions view and write the following code:

extern void = PlaySound( string, int, int ) in winmm.dll name PlaySoundW
' Please change .wav path.
PlaySound( 'h:\start.wav', 0, $20000 + 1 )

Please click Program -> Run menu item to test it.

As above, we use extern keyword to quote the Windows API function PlaysoundW, similarly, you can use extern to quote other Windows API functions or the functions that stored in other DLL files.

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