Bottom up DIB and Top down DIB

The origin for a bottom-up DIB is the lower-left corner of the bitmap; the origin for a top-down DIB is the upper-left corner.

I faced the problem like this
I have drawn the image using DrawText() fn... it succeeds... But it didnt work well...
I used the hBackDC to DrawText()... On hBackDC I selected the hBackBitmap object.
hBackBitmap holds the image size as 320 * 240 bitmap...
using DrawText() I displayed the image in out of region in hBackBitmap...
it wont get any error.
Even though the x,y values exceeds, DrawText( ) fails...

I must start the basics in CSource filter...