>>I have this problem from the first version of this grid class.
>>I think this is a good class for the grid but I can't use it because it's very very slow.
>>I have VFP6 SP4 with a PIII500 with 128Kb.
>
>Hola, Esteban.
>
>Have you tried the latest? It's 3.6 and you can find it easily in the Files Section looking for it with the cool new All Files list.
>
>The speed is not as if it was implemented natively, but if you need its features, in my opinion, is just a worth price to pay.
>
>Hope this helps.


There are two parts in it. Essentially on INIT() Grid Highlighter sets the grid native Dynamic... properties for its work. That is not slower than any other way to set and use Dynamic... properties.

Then, the code in .Highlight_row() method operates with extra features - current cell and header highlighting where the code have to take care of what is currently selected, considering that:

Columns may be moved around the grid so the ActiveColumn is not the same as ColumnOrder.

It has to know what kind of control is the CurrentControl (Textbox, Combobox, Picture, etc. and whether it has .Backcolor property.

It takes care of setting the colors for the active column Header and restoring the original colors for peviously selected column header. Of course, all that code slows down the process. You may see a speed change in a sample form if you turn off most of the options.

Also the speed depends of complexity of Dynamic... expression which may be the case for custom group records highlighting.

Other than that it could be the underlying data which slow down the grid operation, as James noticed.