cpl file is an item that is located in Control Panel. The following list describes some of the files that are implemented as DLLs in Windows operating systems:Īn example of an ActiveX control is a calendar control that lets you select a date from a calendar.Īn example of a. When these changes are isolated to a DLL, you can apply an update without needing to build or install the whole program again. For example, you may have a payroll program, and the tax rates change each year. Because the modules are separate, the load time of the program is faster, and a module is only loaded when that functionality is requested.Īdditionally, updates are easier to apply to each module without affecting other parts of the program. Each module can be loaded into the main program at run time if that module is installed. For example, an accounting program may be sold by module. This helps promote code reuse and efficient memory usage.īy using a DLL, a program can be modularized into separate components. Therefore, each program can use the functionality that is contained in this DLL to implement an Open dialog box. For example, in Windows operating systems, the Comdlg32 DLL performs common dialog box related functions. A DLL is a library that contains code and data that can be used by more than one program at the same time.
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