Application sharing with occlusion removal

A system for sharing a computer window of a plurality of computer windows on a computer desktop, comprising:

• a processor;
• a memory communicatively coupled to the processor, bearing computer-readable instructions that, upon execution on the processor, cause the system at least to:
• determine the position of a first window of the plurality of computer windows on the computer desktop;
• in response to determining determine that the first window is shared and is stored in a memory area separate from a memory area where the computer desktop is stored, disable a setting for the first window, the setting when enabled indicating that the first window is drawn in a window buffer without a border;
• after disabling the setting, copy the first window from a window buffer to a composition image based on the position of the first window;
• and
• send the composition image to a client.

A computer-readable storage device for sharing a computer window of a plurality of computer windows on a computer desktop, bearing computer-readable instructions that upon execution on a computer, cause the computer to perform operations comprising:

• determining the position of a first window of the plurality of computer windows on the computer desktop;
• in response to determining that the first window is shared and is stored in a memory area separate from a memory area where the computer desktop is stored, disabling a setting for the first window, the setting when enabled indicating that the first window is drawn in a window buffer without a border regardless of whether the first window is shared;
• after disabling the setting, copying the first window from a window buffer to a composition image based on the position of the first window;
• sending the composition image to a client computer.