再學GDI+[15]: GDIPAPI 單元提供的Make及Color系列函數

function MakePoint(X, Y: Integer): TGPPoint; overload;
function MakePoint(X, Y: Single): TGPPointF; overload;
function MakeSize(Width, Height: Integer): TGPSize; overload;
function MakeSize(Width, Height: Single): TGPSizeF; overload;
function MakeRect(x, y, width, height: Integer): TGPRect; overload;
function MakeRect(x, y, width, height: Single): TGPRectF; overload;
function MakeRect(location: TGPPoint; size: TGPSize): TGPRect; overload;
function MakeRect(location: TGPPointF; size: TGPSizeF): TGPRectF; overload;
function MakeRect(const Rect: TRect): TGPRect; overload;
function MakeColor(r, g, b: Byte): ARGB; overload;
function MakeColor(a, r, g, b: Byte): ARGB; overload;
function MakeCharacterRange(First, Length: Integer): TCharacterRange;

//獲取透明度

function GetAlpha(color: ARGB): BYTE;

//獲取紅色成分

function GetRed(color: ARGB): BYTE;

//獲取綠色成分

function GetGreen(color: ARGB): BYTE;

//獲藍色成分

function GetBlue(color: ARGB): BYTE;

//Delphi 顏色轉換到 GDI+ 顏色

function ColorRefToARGB(rgb: COLORREF): ARGB;

//GDI+ 顏色轉換到 Delphi 顏色

function ARGBToColorRef(Color: ARGB): COLORREF;