Howto modify DXF codes inside entities?

[fsztuczny]

For example I need change only DXF 30 inside polyline without using API.

[Alexander.Rivilis]

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@fsztuczny wrote:

For example I need change only DXF 30 inside polyline without using API.

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What do you mean "without using API"?

[fsztuczny]

Hatch modified by the API (Elevation - DXF code 10) was not physically at a preset level. I saved the DWG file to DXF file. Hatch had a DXF code 10 set, but the code 30 had a value that reflects the actual position. I would like to change code DXF directly.

[Alexander.Rivilis]

With help of P/Invoke next functions you can do it:
acdbGetAdsName
acdbEntGet
acdbEntMod
acdbEntUpd

[fsztuczny]

Is the p / invoke is portable between different versions of AutoCAD?

[Alexander.Rivilis]

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@fsztuczny wrote:
Is the p / invoke is portable between different versions of AutoCAD?

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You can do it portable if you check AutoCAD version (Application.Version) and x86/x64

As a example: http://forums.autodesk.com/t5/NET/Determine-32-or-64-bit-application/m-p/3748030#M32834

[fsztuczny]

Thank you.

[fsztuczny]

Would you give an example of how to do this in C# ?