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Geek Culture / Merging Delphi and DBPro

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Hamish McHaggis
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Posted: 22nd Oct 2005 17:10
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The effect I am looking for I have seen done in VB, but that was a long time ago, and I can't remember how it was done.

I am trying to make a simple app which uses Delphi and DBPro in parallel by communicating using memblocks. Does anyone know how you would go about locking a DB window inside a Delphi app? Presumably it would be done by somehow passing the DBPro window handle to Delphi and locking the window somehow? I am imagining that I could set up communications by running a DBPro app, which then ran a Delphi app, passing a pointer to a memblock somehow to it, but again I wouldn't really know where to start .

If anyone can help it would be umm... helpful . Cheers.

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Posted: 22nd Oct 2005 17:39 Edited at: 22nd Oct 2005 17:43
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You can use the win API function "SetParent" to make the DB window a child of a Delphi component, for example a panel. You can adjust the position and size of the DB window with "SetWindowPos". Depending on how exactly you want to have the DB window appear in your Delphi app, you'd probably need to change its style too.

By the way it's possible to adjust parent/child window settings on the DBpro side with an ini file. However, I haven't checked that out yet.


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Hamish McHaggis
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Posted: 22nd Oct 2005 18:29
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Cool, I'll check that out and report back . Have you any ideas about the best way to communicate using memblocks?

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Posted: 22nd Oct 2005 19:14
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I'm afraid, unless your Delphi app is a DLL, memblocks won't work. Two different processes cannot access the same memory area.


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David T
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Posted: 22nd Oct 2005 19:23
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Create a file called [dbappname].ini.

Inside it put



it will only work for MDI apps as it was designed for FPSC. Run the dbpro app and it will render to the child window.

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Benjamin
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Posted: 22nd Oct 2005 19:28
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Or you could try file mapping. I believe the enhancement pack supports it.

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Posted: 22nd Oct 2005 19:48
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Yes filemapping is the best way to exchange data between separate apps. FPSC uses it it too IIRC.


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Hamish McHaggis
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Posted: 22nd Oct 2005 19:57
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Hmm, sounds good. Maybe I'll have to invest in the enhancement pack.

I have managed to get the DBPro window docked with the Delphi window (in about 3 lines once you know how ). Cheers all, I'll take a look at the enhancement pack now.

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