Monday, May 11, 2009

HMG Coding Tips by Esgici

CCH: The following are useful tips by Esgici of the HMG Forum in response to one of my posts.

By Esgici - 10th May 2009

For any code BEFORE defining Main Form must don't include any GUI control.

In summary :

- Every HMG appl must one only one Main Window

- The message functions ( MsgXXXX() ) are only exceptions of this rule, as explained in one of HMG Help topics .

- Since the message functions are special cases, there isn't any way to add another control such as Progress Bar. A messages window with such control may be only an user defined form or control and so must depend to main form ( by a direct or indirect way )

- Code placed BEFORE defining and activating Main Form must don't have any GUI control.

- Code between DEFINE WINDOW and END WINDOW are definitions statement only.

- Form and controls included in a form will be realized by ACTIVATE command, not when defined.

- ON INIT is a event definition and will be fired first when ACTIVATE command executed. So you can reference a control defined in this window in a ON INIT procedure / function / code block.

As far as know there isn't any special case when an appl launched by another one ( except any communication betwwen them ). An appl work rightly stand alone must also work by calling another one.
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1 comment:

  1. Sudip BhattacharyyaMay 11, 2009 at 10:55 PM

    Hi,

    Like Msgxxx functions there is at least another function GetFile(), which can be used before Main window defination.

    Regards.

    Sudip

    ReplyDelete

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