Visual Circuits H-DVP, User Manual

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Appendix
50
The function definitions include the name of the function, and the
arguments that the function must be sent, as well as the variable
type of those arguments.
For VB programmers, the function must be DECLARED in a
module before it can be used.
All functions will return a no_error message, unless otherwise
stated.
File Playback Commands
mpgOpenDriver
The mpgOpenDriver function initializes the driver and prepares the
card for use. This function must be called, successfully, before any
other functions will work.
9&&&$//PSJ2SHQ'ULYHU
Visual Basic Call
PSJ2SHQ'ULYHU
Remarks
It is absolutely imperative that this function is called early in the
program. The driver needs to be opened and initialized before any
other functions listed in the document will work.
mpgCloseDriver
The mpgCloseDriver function is used to let the driver go free for
use by the program, or other programs, later. This function should
be called while the program is closing.