Subtract Method
Collapse the table of content
Expand the table of content

IntPtr.Subtract Method

[ This article is for Windows Phone 8 developers. If you’re developing for Windows 10, see the latest documentation. ]

Subtracts an offset from the value of a pointer.

Namespace:  System
Assembly:  mscorlib (in mscorlib.dll)

public static IntPtr Subtract(
	IntPtr pointer,
	int offset
)

Parameters

pointer
Type: System.IntPtr
The pointer to subtract the offset from.
offset
Type: System.Int32
The offset to subtract.

Return Value

Type: System.IntPtr
A new pointer that reflects the subtraction of offset from pointer.

The Subtract method does not throw an exception if the result is too small to represent as a pointer on the specified platform. Instead, the subtraction operation is performed in an unchecked context.

Languages that do not support operator overloading or custom operators can use this method to subtract an offset from the value of a pointer.

The following example instantiates an IntPtr object that points to the end of a ten-element array, and then calls the Subtract method to iterate the elements in the array in reverse order.

Windows Phone OS

Supported in: 8.1, 8.0

Show:
© 2017 Microsoft