Abstract: A method for enhancing the operable functionality of an existing target software application with a complex technological add-in can include mapping a library function containing a surrogate procedure to at least one of a multiplicity of application programs executing in a computer system. Upon command from an injection software application program, the library function can be selectively caused to map to the existing target software application. More specifically, a first pointer to a target procedure can be replaced with a second pointer to the surrogate procedure, so that the surrogate procedure receives intercepted messages that would otherwise be received by the target procedure. The intercepted messages can be processed in the surrogate procedure to modify an operating feature of the target application program. Also, an emulation procedure separate from and external to the surrogate procedure can be called to assist the surrogate procedure in processing the intercepted messages.

Abstract: Method and apparatus for seamlessly integrating new or modified user interface features or modified functionality, to an existing target application program (100) in the context of an operating system (102) which assigns a separate process address space for each application program then operating. The disclosed invention does not require re-compiling the existing application program's source code. Rather, a novel approach is provided which allows a technology injection system (TIS) (106) to inject itself directly between a computer operating system (102) and the target program (100) so as to intercept and act upon messages and commands to the target program (100). In this way, the TIS (106) can modify any inputs and outputs of the target program (100).

Abstract: Method and apparatus for seamlessly integrating new or modified user interface features or modified functionality, to an existing target application program (100) in the context of an operating system (102) which assigns a separate process address space for each application program then operating. The disclosed invention does not require recompiling the existing application program's source code. Rather, a novel approach is provided which allows a technology injection system (TIS) (106) to inject itself directly between a computer operating system (102) and the target program (100) so as to intercept and act upon messages and commands to the target program (100). In this way, the TIS (106) can modify any inputs and outputs of the target program (100).

Abstract: Disclosed is a Musical Instrument Digital Interface emulator for testing the THRU port echo of a Musical Instrument Digital Interface device. The emulator has input devices for taking bitstream data from the THRU and OUT ports of the Musical Instrument Digital Interface device, comparing the THRU port bitstream data to the OUT port bitstream data, and generating a result of the comparison. Also disclosed is a method of testing the THRU port echo of a Musical Instrument Digital Interface device by reading the THRU bitstream and OUT bitstream of the Musical Digital Interface Device, bitwise comparing the two bit streams; and reporting the results of the comparison to an output means.