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<title>Windows Interface Reference: Transform structure</title>
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<h1>Transform </h1>
<p>The Transform structure contains functions to apply various co-ordinate transforms
within a window or device context.</p>
<pre>structure Transform:
sig
type HDC
type HWND
type POINT = { x: int, y: int }
type SIZE = { cx: int, cy: int }
datatype Fraction = Fraction of {num: int, denom: int}
datatype
MapMode =
MM_ANISOTROPIC
| MM_HIENGLISH
| MM_HIMETRIC
| MM_ISOTROPIC
| MM_LOENGLISH
| MM_LOMETRIC
| MM_TEXT
| MM_TWIPS
val MM_MAX : MapMode
val MM_MAX_FIXEDSCALE : MapMode
val MM_MIN : MapMode
type XForm = { m11: real, m12: real, m21: real, m22: real, dx: real, dy: real }
type XFormType
val MWT_IDENTITY : XFormType
val MWT_LEFTMULTIPLY : XFormType
val MWT_MAX : XFormType
val MWT_MIN : XFormType
val MWT_RIGHTMULTIPLY : XFormType
type GraphicsMode
val GM_ADVANCED : GraphicsMode
val GM_COMPATIBLE : GraphicsMode
val GM_ERROR : GraphicsMode
val ClientToScreen : HWND * POINT -> POINT
val CombineTransform : XForm * XForm -> XForm
val DPtoLP : HDC * POINT list -> POINT list
val GetCurrentPositionEx : HDC -> POINT
val GetGraphicsMode : HDC -> GraphicsMode
val GetMapMode : HDC -> MapMode
val GetViewportExtEx : HDC -> SIZE
val GetViewportOrgEx : HDC -> POINT
val GetWindowExtEx : HDC -> SIZE
val GetWindowOrgEx : HDC -> POINT
val GetWorldTransform : HDC -> XForm
val LPtoDP : HDC * POINT list -> POINT list
val MapWindowPoints : HWND * HWND * POINT list -> POINT list
val ModifyWorldTransform : HDC * XForm * XFormType -> unit
val OffsetViewportOrgEx : HDC * int * int -> unit * POINT
val OffsetWindowOrgEx : HDC * int * int -> unit * POINT
val ScaleViewportExtEx : HWND * Fraction * Fraction -> SIZE
val ScaleWindowExtEx : HWND * Fraction * Fraction -> SIZE
val ScreenToClient : HWND * POINT -> POINT
val SetGraphicsMode : HDC * GraphicsMode -> GraphicsMode
val SetMapMode : HDC * MapMode -> MapMode
val SetViewportExtEx : HDC * int * int -> unit * SIZE
val SetViewportOrgEx : HDC * int * int -> unit * POINT
val SetWindowExtEx : HDC * int * int -> unit * SIZE
val SetWindowOrgEx : HDC * int * int -> unit * POINT
val SetWorldTransform : HDC * XForm -> unit
end</pre>
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