LC_EVENT_LBDOWN

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LiteCAD generates LC_EVENT_LBDOWN event when a user presses left mouse button while the cursor is inside of the graphics window.

The following properties are used for this event type:

Property	Description
LC_PROP_EVENT_TYPE	Value LC_EVENT_LBDOWN
LC_PROP_EVENT_WND	Handle to a graphics window
LC_PROP_EVENT_DRW	Handle to a drawing, viewed in the window
LC_PROP_EVENT_BLOCK	Handle to active block (linked to the window)
LC_PROP_EVENT_FLOAT1 LC_PROP_EVENT_FLOAT2	X,Y cursor coordinates (drawing coordinate space)
LC_PROP_EVENT_INT1 LC_PROP_EVENT_INT2	X, Y cursor coordinates (window coordinate space, pixels)
LC_PROP_EVENT_INT3	State of Shift key: 1-pressed, 0-released
LC_PROP_EVENT_INT4	State of Ctrl key: 1-pressed, 0-released

In order to override LiteCAD default processing of this event, within the event procedure call lcEventReturnCode function with non-zero parameter.