procedure TForm1.FormCreate(Sender: TObject);
var
　pfd:TPIXELFORMATDESCRIPTOR;
  pixelFormat: Integer;
begin
  With pfd do
  begin
    nSize := sizeof(TPIXELFORMATDESCRIPTOR); // size
    nVersion := 1; // version
    dwFlags := PFD_SUPPORT_OPENGL or PFD_DRAW_TO_WINDOW or PFD_DOUBLEBUFFER; // support double-buffering
    iPixelType := PFD_TYPE_RGBA; // color type
    cColorBits := 24; // preferred color depth
    cRedBits := 0;
    cRedShift := 0; // color bits (ignored)
    cGreenBits := 0;
    cGreenShift := 0;
    cBlueBits := 0;
    cBlueShift := 0;
    cAlphaBits := 0;
    cAlphaShift := 0; // no alpha buffer
    cAccumBits := 0;
    cAccumRedBits := 0; // no accumulation buffer,
    cAccumGreenBits := 0; // accum bits (ignored)
    cAccumBlueBits := 0;
    cAccumAlphaBits := 0;
    cDepthBits := 16; // depth buffer
    cStencilBits := 0; // no stencil buffer
    cAuxBuffers := 0; // no auxiliary buffers
    iLayerType := PFD_MAIN_PLANE; // main layer
    bReserved := 0;
    dwLayerMask := 0;
    dwVisibleMask := 0;
    dwDamageMask := 0;
  end;
  FDC := GetDC(Handle);
  pixelFormat := ChoosePixelFormat(FDC, @pfd);
  if pixelFormat = 0 then
    Exit;
  if not SetPixelFormat(FDC, pixelFormat, @pfd) then
    Exit;
  FHRC := wglCreateContext(FDC);
  wglMakeCurrent(FDC, FHRC);

  // 设置背景色为 黑色 参数为 RGBA
  glClearColor(0, 0, 0, 0);
  // 设置视图投影变换矩阵 正投影
  glMatrixMode(GL_PROJECTION);
  // 重置当前指定的矩阵为单位矩阵
  glLoadIdentity;
  // 指定OpenGL在此区域内绘图
  glViewPort(0, 0, ClientWidth, ClientHeight);
  // 设置世界坐标系的范围
  gluOrtho2D(0, ClientWidth, ClientHeight, 0);
  // 将矩阵变换对象切换为模型视图变换
  glMatrixMode(GL_MODELVIEW);
  // 重置当前指定的矩阵为单位矩阵
  glLoadIdentity;
end;

procedure TForm1.Draw;
begin
  // 清空缓冲区
  glClear(GL_COLOR_BUFFER_BIT or GL_DEPTH_BUFFER_BIT);
  // 清空缓冲区
  glColor3ub(0, 255, 0);
  glBegin(GL_TRIANGLES);//告诉OpenGL将要绘制三角形
  glVertex2f(200, 300);  //传输三角形的三个顶点坐标给OpenGL
  glVertex2f(400, 300);
  glVertex2f(300, 150);
  glEnd; //结束图元的绘制。
  SwapBuffers(FDC); //交换双缓冲区内容，这将把刚绘制的图形翻印到屏幕上。
end;

unit Unit1;

interface

uses
  Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
  Dialogs, OpenGL;

type
  TForm1 = class(TForm)
    procedure FormCreate(Sender: TObject);
    procedure FormDestroy(Sender: TObject);
    procedure FormPaint(Sender: TObject);
    procedure FormResize(Sender: TObject);
  private
    { Private declarations }
    FDC: HDC;
    FHRC: HGLRC;
    procedure Draw;
  public
    { Public declarations }
  end;

var
  Form1: TForm1;

implementation

{$R *.dfm}

procedure TForm1.Draw;
begin
  // 清空缓冲区
  glClear(GL_COLOR_BUFFER_BIT or GL_DEPTH_BUFFER_BIT);
  // 清空缓冲区
  glColor3ub(0, 255, 0);
  glBegin(GL_TRIANGLES);//告诉OpenGL将要绘制三角形
  glVertex2f(200, 300);  //传输三角形的三个顶点坐标给OpenGL
  glVertex2f(400, 300);
  glVertex2f(300, 150);
  glEnd; //结束图元的绘制。
  SwapBuffers(FDC); //交换双缓冲区内容，这将把刚绘制的图形翻印到屏幕上。
end;

procedure TForm1.FormCreate(Sender: TObject);
var
　pfd:TPIXELFORMATDESCRIPTOR;
  pixelFormat: Integer;
begin
  With pfd do
  begin
    nSize := sizeof(TPIXELFORMATDESCRIPTOR); // size
    nVersion := 1; // version
    dwFlags := PFD_SUPPORT_OPENGL or PFD_DRAW_TO_WINDOW or PFD_DOUBLEBUFFER; // support double-buffering
    iPixelType := PFD_TYPE_RGBA; // color type
    cColorBits := 24; // preferred color depth
    cRedBits := 0;
    cRedShift := 0; // color bits (ignored)
    cGreenBits := 0;
    cGreenShift := 0;
    cBlueBits := 0;
    cBlueShift := 0;
    cAlphaBits := 0;
    cAlphaShift := 0; // no alpha buffer
    cAccumBits := 0;
    cAccumRedBits := 0; // no accumulation buffer,
    cAccumGreenBits := 0; // accum bits (ignored)
    cAccumBlueBits := 0;
    cAccumAlphaBits := 0;
    cDepthBits := 16; // depth buffer
    cStencilBits := 0; // no stencil buffer
    cAuxBuffers := 0; // no auxiliary buffers
    iLayerType := PFD_MAIN_PLANE; // main layer
    bReserved := 0;
    dwLayerMask := 0;
    dwVisibleMask := 0;
    dwDamageMask := 0;
  end;
  FDC := GetDC(Handle);
  pixelFormat := ChoosePixelFormat(FDC, @pfd);
  if pixelFormat = 0 then
    Exit;
  if not SetPixelFormat(FDC, pixelFormat, @pfd) then
    Exit;
  FHRC := wglCreateContext(FDC);
  wglMakeCurrent(FDC, FHRC);

  // 设置背景色为 黑色 参数为 RGBA
  glClearColor(0, 0, 0, 0);
  // 设置视图投影变换矩阵 正投影
  glMatrixMode(GL_PROJECTION);
  // 重置当前指定的矩阵为单位矩阵
  glLoadIdentity;
  // 指定OpenGL在此区域内绘图
  glViewPort(0, 0, ClientWidth, ClientHeight);
  // 设置世界坐标系的范围
  gluOrtho2D(0, ClientWidth, ClientHeight, 0);
  // 将矩阵变换对象切换为模型视图变换
  glMatrixMode(GL_MODELVIEW);
  // 重置当前指定的矩阵为单位矩阵
  glLoadIdentity;
end;

procedure TForm1.FormDestroy(Sender: TObject);
begin
  wglMakeCurrent(FDC, FHRC);
  wglDeleteContext(FHRC);
  ReleaseDC(Handle, FDC);
end;

procedure TForm1.FormPaint(Sender: TObject);
begin
  Draw;
end;

procedure TForm1.FormResize(Sender: TObject);
begin
  // 窗口改变大小时重新指定绘图区域
  glClearColor(0, 0, 0, 0);
  glMatrixMode(GL_PROJECTION);
  glLoadIdentity;
  glViewPort(0, 0, ClientWidth, ClientHeight);
  gluOrtho2D(0, ClientWidth, ClientHeight, 0);
  glMatrixMode(GL_MODELVIEW);
  glLoadIdentity;
end;

end.