GETBOXGROW()
 Gets the time delay with which boxes are opened
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 Syntax

     GETBOXGROW() --> nTimeDelay

 Returns

     GETBOXGROW() returns the value set in SETBOXGROW() for the delay in
     creating a box.

 Description

     GETBOXGROW() retrieves the time delay that a box in "grow" mode has when
     it is opened.

 Example

     Here is an example of a box with 10 milliseconds between each growth
     step:

     SETBOXGROW(10)
     WOPEN(2, 2, 23, 78)            // Sets box coordinates only
     WBOX()                         // Generates box with delay
     ? GETBOXGROW()                 // Result: 10