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If you want to share an I/O procedure with other applications, you need to write a dynamic-link library (DLL) for your application. You can share the I/O procedure by doing one of the following:
· Include the code for the I/O procedure in the DLL.
· Create a function in the DLL that calls the mmioInstallIOProc function to install the I/O procedure.
· Export this function in the module-definitions file of the DLL.
To use the shared I/O procedure, an application must first call the function in the DLL to install the I/O procedure.