There are many things in Spread COM that do not translate into the .NET framework, and so are not a part of the Spread.NET product. This topic discusses a few of those; it is not a comprehensive analysis of how the two versions of Spread compare, nor is it a complete list of what is new in the .NET framework. For more information on the .NET framework, refer to the Microsoft documentation.

Spread COM does not handle formula error codes the same way as Spread.NET. In Spread COM when a formula evaluates to an error code, the cell displays as empty.

DataFillEvent, DAutoFill, DAutoSave, and DInformActiveRowChange in Spread COM are not handled the same way in .NET.

NoBorder and NoBeep have no equivalent in .NET.

VirtualCurRowCount, VirtualCurTop, VirtualMaxRows, VirtualMode, VirtualOverlap, VirtualRows, and VirtualScrollBuffer are not handled the same in .NET.

In the Spread COM control, custom functions were evaluated inside the CustomFunction event. In Spread.NET, custom functions are evaluated inside an Evaluate method in classes in the CalcEngine assembly.

ColWidthToTwips, RowHeightToTwips, TwipsToColWidth, and TwipsToRowHeight, as any methods that use twips, are not handled the same in .NET. For sizes, the .NET products use pixels.

Any of the methods that use graphics as in LoadPictureBuffer, SavePicture, SavePictureBuffer, and LoadResPicture, the graphics are not handled the same in .NET.