query_insert

query_insert ( : : WindowHandle : Mode )

Query the possible graphic modes.

query_insert returns the possible modes pixels can be displayed in the output window. New pixels may e.g. overwrite old ones. In most of the cases there is a functional relationship between old and new values.

Possible display functions: 'copy' overwrite displayed pixels 'xor' display old "xor" new pixels 'complement' complement displayed pixels

"copy" is always available.

Parameters

`WindowHandle` (input_control)	window `->` integer
Window_id.

`Mode` (output_control)	string-array `->` string
Display function name.

Result

query_insert returns 2 (H_MSG_TRUE), if the window is valid. Otherwise an exception handling is raised.

Parallelization Information

query_insert is reentrant, local, and processed without parallelization.

Possible Successors

set_insert, disp_region

See also

set_insert, get_insert

Module

Foundation