Execute LabTalk script with a specific layer as the active layer. This method is equivalent to the LabTalk commands "win -o" and "layer -o".
BOOL LT_execute( LPCSTR lpcszstr, int wCntrl = 0 )
//Use LabTalk script to set X scale of the graph layers.
// Call this function with a graph window active that has two layers
// Declare graph page object and point to active page in project
if( gpg.IsValid() )
// Declare graph layer objects and attach to layers 1 and 2
GraphLayer gly1 = gpg.Layers( 0 );
GraphLayer gly2 = gpg.Layers( 1 );
if( gly1.IsValid() && gly2.IsValid() )
// Use LabTalk script to set X scale of layer 1 to -10 to 10
strScript.Format( "layer.x.from=%f; layer.x.to=%f;", -10.0, 10.0 );
gly1.LT_execute( strScript );
// Use LabTalk script to set X scale of layer 2 to 0 to 100
strScript.Format( "layer.x.from=%f; layer.x.to=%f;", 0.0, 100.0 );
gly2.LT_execute( strScript );
out_str( "Graph page needs to have at least two layers" );
out_str( "Active page is not a graph page" );
The Layer Object is only temporarily set as the active layer. The Layer that was active before the code executes is restored as active upon return.