Operator VARPTR (Variable pointer)


Returns the address of a variable or object

Syntax:
declare operator Varptr ( byref lhs as T ) as T ptr

Syntax:
result = Varptr ( lhs )

Parameters:
lhs
A variable or object.
T
Any data type.

Return Value:
Returns the address of a variable or object.

Description:
This operator returns the address of its operand.

When the operand is of type String, the address of the internal string descriptor is returned. Use Operator Strptr (String pointer) to retrieve the address of the string data.

The operand cannot be an array, but may be an array element. For example, "Varptr(myarray(0))" returns the address of "myarray(0)".

Operator @ (Address of), when used with variables or objects, has identical behavior.

Examples:
Dim a As Integer, addr As Integer
a = 10

'' place the address of a in addr
addr = CInt( VarPtr(a) )

'' change all 4 bytes (size of INTEGER) of a
Poke Integer, addr, -1000
Print a

'' place the address of a in addr (same as above)
addr = CInt( @a )

'' print the least or most significant byte, depending on the CPU endianess
Print Peek( addr )


Differences from QB:
See also:
Back to Pointer Operators
Back to Operators
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