TYPE: COP
TITLE: VEX Filter COP

This operation runs a VEX script on its input planes. 

Middle click on the dialog '?' help for more help on maskable operations.
Right click on the dialog '?' help for more help on VEX operations. 

Parameters:
VEX Filter
    VEX Function         - The VEX script to run, with any parameter 
			   arguments you wish to override.
    Reload VEX Functions - Reloads the VEX script. Useful if the script
			   has been modified and re-compiled.

Mask & Plane Scope, Frame Scope
    Overview - See extra help (Middle click on the dialog '?' help).

Local Variables:
    L   - Sequence length
    S   - Start of sequence
    E   - End of sequence
    IL  - Input sequence length
    SR  - Sequence frame rate
    NP  - Number of planes in sequence
    W,H - Width and height of image
    I   - Image index (0 at start frame)
    IT  - Image time (0 at start frame)
    AI  - Current plane array index
    PI  - Current plane index
    PC  - Num of channels in current plane
