DataType

Ptr

Description

A reference to a chunk of memory. You can pass a MemoryBlock object via this data type and it will be treated as a pointer to the memory contained within the MemoryBlock.

Methods

Name	Parameters	Returns
Boolean	offset As Integer = 0	Boolean
Byte	offset As Integer = 0	Byte
CFStringRef	offset As Integer = 0	CFStringRef
Color	offset As Integer = 0	Color
CString	offset As Integer = 0	CString
Currency	offset As Integer = 0	Currency
Double	offset As Integer = 0	Double
Int16	offset As Integer = 0	Int16
Int32	offset As Integer = 0	Int32
Int64	offset As Integer = 0	Int64
Int8	offset As Integer = 0	Int8
Integer	offset As Integer = 0	Integer
Single	offset As Integer = 0	Single
Structure	offset As Integer = 0	Structure
UInt16	offset As Integer = 0	UInt16
UInt32	offset As Integer = 0	UInt32
UInt64	offset As Integer = 0	UInt64
UInt8	offset As Integer = 0	UInt8
UInteger	offset As Integer = 0	UInteger
WString	offset As Integer = 0	WString

Method descriptions

Ptr.Boolean

Boolean(offset As Integer = 0) As Boolean

Converts the value referenced to by the pointer to a Boolean.

Ptr.Byte

Byte(offset As Integer = 0) As Byte

Converts the value referenced to by the pointer to a Byte.

Ptr.CFStringRef

CFStringRef(offset As Integer = 0) As CFStringRef

Converts the value referenced to by the pointer to a CFStringRef.

Ptr.Color

Color(offset As Integer = 0) As Color

Converts the value referenced to by the pointer to a Color.

Ptr.CString

CString(offset As Integer = 0) As CString

Converts the value referenced to by the pointer to a CString.

Ptr.Currency

Currency(offset As Integer = 0) As Currency

Converts the value referenced to by the pointer to a Currency.

Ptr.Double

Double(offset As Integer = 0) As Double

Converts the value referenced to by the pointer to a Double.

Ptr.Int16

Int16(offset As Integer = 0) As Int16

Converts the value referenced to by the pointer to an Int16.

Ptr.Int32

Int32(offset As Integer = 0) As Int32

Converts the value referenced to by the pointer to an Int32.

Ptr.Int64

Int64(offset As Integer = 0) As Int64

Converts the value referenced to by the pointer to an Int64.

Ptr.Int8

Int8(offset As Integer = 0) As Int8

Converts the value referenced to by the pointer to an Int8.

Ptr.Integer

Integer(offset As Integer = 0) As Integer

Converts the value referenced to by the pointer to an Integer.

Ptr.Single

Single(offset As Integer = 0) As Single

Converts the value referenced to by the pointer to a Single.

Ptr.Structure

Structure(offset As Integer = 0) As Structure

Converts the value referenced to by the pointer to a specific Structure type.

Given a structure, you can dereference it from a pointer like this:

Structure TestStruct
  Value As Int64
End Structure

Var p As Ptr ' assign an appropriate Ptr value
Var structVar As TestStruct = p.TestStruct

structVar.Value = 42

Ptr.UInt16

UInt16(offset As Integer = 0) As UInt16

Converts the value referenced to by the pointer to an UInt16.

Ptr.UInt32

UInt32(offset As Integer = 0) As UInt32

Converts the value referenced to by the pointer to an UInt32.

Ptr.UInt64

UInt64(offset As Integer = 0) As UInt64

Converts the value referenced to by the pointer to an UInt64.

Ptr.UInt8

UInt8(offset As Integer = 0) As UInt8

Converts the value referenced to by the pointer to an UInt8.

Ptr.UInteger

UInteger(offset As Integer = 0) As UInteger

Converts the value referenced to by the pointer to an UInteger.

Ptr.WString

WString(offset As Integer = 0) As WString

Converts the value referenced to by the pointer to a WString.

Notes

A Ptr is 4 bytes for 32-bit apps and 8 bytes for 64-bit apps.

You can compare one Ptr to another Ptr or to Nil.

You can convert the value referenced to by the pointer to a specific data type using the available methods.

You can assign a Ptr to a MemoryBlock.

You can convert the value referenced to by the pointer to a specific datatype using the Pointer Properties: Boolean, Byte, CFStringRef, Class, Color, CString, Currency, Double, Int16, Int32, Int64, Int8, Integer, Object, Ptr, Short, Single, UInt16, UInt32, UInt64, UInt8, WString.

You can compare one Ptr to another or to Nil.

Sample code

Var p1, p2, p3 As Ptr

p1 = AddressOf someMethod
p2 = someMemoryBlock ' A Ptr to the MemoryBlock itself
p3 = someMemoryBlock.Ptr(n) ' Retrieve Ptr stored within the MemoryBlock at offset n

Compatibility

All project types on all supported operating systems.

Ptr