New Post: Select multiple layers with cmSelection Tool

Hi, you should handle SelectBoxFinal event and call Shapefile.SelectShapes for each layer. Here is a single layer example. To run it for multiple layers something like this should be used:

for (int i = 0; i < axMap1.NumLayers; i++)
{
    int layerHandle = axMap1.get_LayerHandle(i);
    var sf = axMap1.get_Shapefile(layerHandle);
    if (sf != null)
    {
        //sf.SelectShapes
    }
}

Version 4.9.3 also has built-in in selection mechanism (ChooseLayer event should be handled). It's described in my post here . However it won't suit your needs, since there is no way to run it for multiple layers.

Hope this helps,
Sergei