The DICONSTANTFORCE structure contains type-specific information for effects that are marked as DIEFT_CONSTANTFORCE.
The structure describes a constant force effect.
A pointer to a single DICONSTANTFORCE structure for an effect is passed in the lpvTypeSpecificParams member of the DIEFFECT structure.
typedef struct DICONSTANTFORCE { 
    LONG lMagnitude; 
} DICONSTANTFORCE, *LPDICONSTANTFORCE; 
 
typedef const DICONSTANTFORCE *LPCDICONSTANTFORCE;
   Windows NT/2000: Requires Windows 2000.
  Windows 95/98: Requires Windows 95 or later. Available as a redistributable for Windows 95.
  Header: Declared in dinput.h.