How to Use the render () function in ipicture

1. How to Use the render () function in ipicture
2. What do the Chinese meanings of the parameters of this function mean? This is described in msdn.
3. Hresult render (
4. HDC, // handle of device context on which to render the image
5. Long X, // horizontal position of image in HDC
6. Long y, // vertical position of image in HDC
7. Long CX, // horizontal dimension of destination rectangle
8. Long cy, // vertical dimension of destination rectangle
9. Ole_xpos_himetric xsrc, // horizontal offset in source picture
10. Ole_ypos_himetric ysrc, // vertical offset in source picture
11. Ole_xsize_himetric cxsrc, // amount to copy horizontally in source picture
12. Ole_ysize_himetric cysrc, // amount to copy vertically in source picture
13. Lpcrect prcwbounds // pointer to position of destination for a Metafile HDC
14. );
16. This function displays part of a large picture.
18. HDC: Needless to say
20. X and Y are the start points of the horizontal and vertical coordinates of HDC, CX and Cy are the end points, that is, a rectangle is drawn on HDC, XY is the coordinate of the upper left corner, and cxcy is the coordinate of the lower right corner.
22. Xsrc, ysrc, cxsrc, and cysrc are the coordinates of the Left and bottom right sides of the rectangle, indicating the part to be displayed on HDC in this big picture.
24. Extract the xsrc, ysrc, cxsrc, and cysrc parts from the SRC diagram and paste them on the X, Y, CX, and Cy areas.