Problems with Bitmap

Just write a small function that takes a width a height ,a pointer to a array containing the bitmap data and a file stream.
make the function read width*height from the stream into the array. or write height*width from array to the stream.

- was this what you asked for ?
look at www.wotsit.org for bitmap file structure - you can easily create a small converter from .bmp to your own format .yof


to create the surface - create a surface with the right height and with and lock it, use the pointer to the data in the surface (cant remember the name (probably starts with lpDD ) and read width of data into it height times...

and last - make the file into a tagged format ...
sprites might be saved as
SPRT[...sprite data....]
Bitmaps
BMP_[....bitmap data...]

to read such a file.
first - find a TAG
the TAG SPRT identifies that a sprite is the next thing in the file, read in the sprite and check for the next TAG. read that info and continue...
inside the SPRT there might be other tags that belongs to SPRT such as ANIM (animation frame) or DIR_ (direction)

you write a parser for raeding/loading and a tool to create the files ...

I have tryed this but it don''t work. Do you know where i can find some tutorials about this.
Thank you for your precision.