The subject invention provides for a system and/or methodology that automatically effects populating a visual designer toolbox with predefined custom controls. In accordance with aspects of the subject invention, a user (or application) can program a binary definition of a desired custom control. The subject invention can scan the binary to identify the control and transfer the control onto the toolbox. Once populated onto the toolbox, a user can quickly and easily transfer (e.g., click and drag) the controls onto a form within a project as desired.