The following example creates a linear gradient brush. Then the code gets the brush's rectangle and draws it.
C++
VOID Example_GetRect(HDC hdc)
{
Graphics myGraphics(hdc);
// Create a linear gradient brush.
LinearGradientBrush linGrBrush(
Point(20, 10),
Point(60, 110),
Color(255, 0, 0, 0), // black
Color(255, 0, 0, 255)); // blue
// Obtain information about the linear gradient brush.
Rect rect;
linGrBrush.GetRectangle(&rect);
// Draw the retrieved rectangle.
Pen myPen(Color(255, 0, 0, 0));
myGraphics.DrawRectangle(&myPen, rect);
}
SUB GDIP_GetLineRect (BYVAL hdc AS DWORD)
LOCAL hStatus AS LONG
LOCAL pGraphics AS DWORD
LOCAL pLinBrush AS DWORD
LOCAL pPen AS DWORD
LOCAL pt1 AS POINTF
LOCAL pt2 AS POINTF
LOCAL colorBlack AS DWORD
LOCAL colorBlue AS DWORD
LOCAL rc AS RECTF
hStatus = GdipCreateFromHDC(hdc, pGraphics)
pt1.x = 20 : pt1.y = 10 : pt2.x = 60 : pt2.y = 110
colorBlack = GDIP_ARGB(255, 0, 0, 0)
colorBlue = GDIP_ARGB(255, 0, 0, 255)
hStatus = GdipCreateLineBrush(pt1, pt2, colorBlack, colorBlue, %WrapModeTile, pLinBrush)
' // Obtain information about the linear gradient brush.
hStatus = GdipGetLineRect(pLinBrush, rc)
' // Draw the retrieved rectangle.
hStatus = GdipCreatePen1(GDIP_ARGB(255, 0, 0, 0), 1, %UnitPixel, pPen)
hStatus = GdipDrawRectangle(pGraphics, pPen, rc.x, rc.y, rc.Width, rc.Height)
' // Cleanup
IF pPen THEN GdipDeletePen(pPen)
IF pLinBrush THEN GdipDeleteBrush(pLinBrush)
IF pGraphics THEN GdipDeleteGraphics(pGraphics)
END SUB
(http://www.jose.it-berater.org/captures/GdipGetLineRect.png)