private bool SetAccessibleOption(Object Struct,
Int32 StructSize,
AccessType AccessType,
WinIniFlags IniFlag)
{
bool ReturnValue; // The return value of this method.
// Allocate enough memory to create an unmanaged version
// of the data structure.
IntPtr DataPtr = Marshal.AllocHGlobal(StructSize);
// Point to the managed data stucture using the unmanaged
// memory pointer.
Marshal.StructureToPtr(Struct, DataPtr, true);
// Return true if the SystemParametersInfo() function call
// successfully modifies the Windows Accessibility features
// using the data in the data structure.
ReturnValue = Accessible.SystemParametersInfo(
AccessType,
Convert.ToUInt32(StructSize),
DataPtr,
IniFlag);
// Deallocate the memory we previously allocated.
Marshal.FreeHGlobal(DataPtr);
// Return the data.
return(ReturnValue);
}
private Object GetAccessibleOption(Object Struct,
Int32 StructSize,
AccessType AccessType,
WinIniFlags IniFlag)
{
Object ReturnValue; // The return data.
// Allocate enough memory to create an unmanaged version
// of the data structure.
IntPtr DataPtr = Marshal.AllocHGlobal(StructSize);
// Point to the managed data stucture using the unmanaged
// memory pointer.
Marshal.StructureToPtr(Struct, DataPtr, true);
// Call the SystemParametersInfo() function using the
// unmanaged data structure pointer.
Accessible.SystemParametersInfo(AccessType,
Convert.ToUInt32(StructSize),
DataPtr,
IniFlag);
// Move the data retrieved from the umnanaged environment to
// the managed data structure and return this data structure
// as an object.
ReturnValue = Marshal.PtrToStructure(DataPtr, Struct.GetType());
// Deallocate the memory we previously allocated.
Marshal.FreeHGlobal(DataPtr);
// Return the data.
return(ReturnValue);
}
public static extern bool SystemParametersInfo(AccessType uiAction,
UInt32 uiParam,
IntPtr pvParam,
WinIniFlags fWinIni);
