The RunAnyDll tool can be used to call any Windows API from the command line.
RunAnyDll lets you execute any Windows API from the command line, batch files, startup menu.. anywhere...
And, unlike RunDll32, the RunAnyDll tool is not limited to APIs with specific .
Call MessageBox to get a message box, GetSystemPowerStatus to get available battery power, GetConsoleTitle for the current cmd title, and 1000s more APIs.
To open a messageBox by calling the MessageBox API:
RunAnyDLL user32.dll MessageBoxA UINT 0 LPSTR Welcome LPSTR goodbye UINT 1
To get the current system power status:
RunAnyDll kernel32.dll GetSystemPowerStatus LPBYTE 00
To emit an annoying beep through the computer speakers
RunAnyDLL Kernel32.dll Beep UINT 1200 UINT 1000
RunDll32.exe, part of Windows, can used to run an entry point (function) in a dll. As such, it can be used for many amazing purposes, without writing new code.
However, RunDll32 expects the API called to have 4 specific params: HWND, HINSTANCE, LPSTR, and int. While it still can be used for calling some APIs accepting fewer params, this is not reliable/recommended.
(Discussion at: http://blogs.msdn.com/oldnewthing/archive/2007/06/07/3128210.aspx)
More information and download here