BBC BASIC for Windows
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Could you give me one line of code showing addressing of data indexed by pointer?
Sorry, I can't, because I don't know the format of your bitmap.
In general terms you will need to calculate the offset into the bitmap from your x and y coordinates, add that offset to the base address (bits% in the case of the code you listed), then read the pixel data from memory and separate it into its RGB components (assuming you have selected a colour format rather than monochrome).
But the detailed code will depend on your bitmap's format and dimensions (for example that will determine whether you need to pad each line to an exact multiple of DWORDs).
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