Global Const $GL_VERSION_1_1 = 1
Global Const $PFD_TYPE_RGBA = 0
Global Const $PFD_MAIN_PLANE = 0
Global Const $PFD_DOUBLEBUFFER = 1
Global Const $PFD_DRAW_TO_WINDOW = 4
Global Const $PFD_SUPPORT_OPENGL = 32
Global Const $GL_PROJECTION = 0x1701
Global Const $GL_COLOR_BUFFER_BIT = 0x00004000
Global Const $GL_TRIANGLES = 0x0004


Func _EnableOpenGL($hwnd, ByRef $hDC)
    Local $pfd = DllStructCreate("short nSize;" & _
            "short nVersion;" & _
            "dword dwFlags;" & _
            "byte  iPixelType;" & _
            "byte  cColorBits;" & _
            "byte  cRedBits;" & _
            "byte  cRedShift;" & _
            "byte  cGreenBits;" & _
            "byte  cGreenShift;" & _
            "byte  cBlueBits;" & _
            "byte  cBlueShift;" & _
            "byte  cAlphaBits;" & _
            "byte  cAlphaShift;" & _
            "byte  cAccumBits;" & _
            "byte  cAccumRedBits;" & _
            "byte  cAccumGreenBits;" & _
            "byte  cAccumBlueBits;" & _
            "byte  cAccumAlphaBits;" & _
            "byte  cDepthBits;" & _
            "byte  cStencilBits;" & _
            "byte  cAuxBuffers;" & _
            "byte  iLayerType;" & _
            "byte  bReserved;" & _
            "dword dwLayerMask;" & _
            "dword dwVisibleMask;" & _
            "dword dwDamageMask;")
    Local $h_dc = DllCall("user32.dll", "hwnd", "GetDC", "hwnd", $hwnd)
    DllStructSetData($pfd, "nSize", DllStructGetSize($pfd))
    DllStructSetData($pfd, "nVersion", $GL_VERSION_1_1)
    DllStructSetData($pfd, "dwFlags", BitOR($PFD_DRAW_TO_WINDOW, $PFD_SUPPORT_OPENGL, $PFD_DOUBLEBUFFER))
    DllStructSetData($pfd, "iPixelType", $PFD_TYPE_RGBA)
    DllStructSetData($pfd, "cColorBits", 24)
    DllStructSetData($pfd, "cDepthBits", 16)
    DllStructSetData($pfd, "iLayerType", $PFD_MAIN_PLANE)
    DllOpen("gdi32.dll")
    DllOpen("opengl32.dll")
    Local $iFormat = DllCall("gdi32.dll", "int", "ChoosePixelFormat", "hwnd", $h_dc[0], "ptr", DllStructGetPtr($pfd))
    Local $iSetFormat = DllCall("gdi32.dll", "int", "SetPixelFormat", "hwnd", $h_dc[0], "int", $iFormat[0], "ptr", DllStructGetPtr($pfd))
    Local $h_cont = DllCall("opengl32.dll", "hwnd", "wglCreateContext", "hwnd", $h_dc[0])
    Local $iRet = DllCall("opengl32.dll", "int", "wglMakeCurrent", "int", $h_dc[0], "int", $h_cont[0])
    $hDC = $h_dc[0]
    Return 1
EndFunc   ;==>EnableOpenGL

Func _glBegin($mode)
    DllCall("opengl32.dll", "none", "glBegin", "uint", $mode)
EndFunc   ;==>glBegin

Func _glClear($mask)
    DllCall("opengl32.dll", "none", "glClear", "uint", $mask)
EndFunc   ;==>glClear

Func _glColor3f($red, $green, $blue)
    DllCall("opengl32.dll", "none", "glColor3f", "float", $red, "float", $green, "float", $blue)
EndFunc   ;==>glColor3f

Func _glEnd()
    DllCall("opengl32.dll", "none", "glEnd")
EndFunc   ;==>glEnd

Func _glMatrixMode($mode)
    DllCall("opengl32.dll", "none", "glMatrixMode", "uint", $mode)
EndFunc   ;==>glMatrixMode

Func _glVertex3f($x, $y, $z)
    DllCall("opengl32.dll", "none", "glVertex3f", "float", $x, "float", $y, "float", $z)
EndFunc   ;==>glVertex3f

Func _glViewport($x, $y, $width, $height)
    DllCall("opengl32.dll", "none", "glViewport", "int", $x, "int", $y, "int", $width, "int", $height)
EndFunc   ;==>glViewport

Func _SwapBuffers($hDC)
    DllCall("gdi32.dll", "int", "SwapBuffers", "hwnd", $hDC)
EndFunc   ;==>SwapBuffers