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Opens a dialog box showing a progress bar.
| Number | Type | Compulsory | Default | Description | 
|---|---|---|---|---|
| 1 | real | Yes | 
 | Position of progress bar in % | 
| 2 | string array | No | <<empty>> | options/control | 
Value from 0 to 100 specifying the position of the bar.
String array of max length 2 used to specify options and control as follows:
| 'open' | Box is displayed (cannot be used with 'close') | 
| 'close' | Box is hidden (cannot be used with 'open') | 
| 'showabort' | If specified an abort button will be displayed | 
Return type: real
The function returns a two element array. The first element returns the value of argument 1, while the second returns 1 if the abort button has been pressed. If the abort button has not been pressed, the second element returns 0.
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