Load bitmap into WinBGim

[Hudson1947]

Hello, i'm using WinBGim to draw some graphs. This part I did it with no trouble, but i'm stacked trying to load a bitmap into that draw.
I've found the function putimage;

void putimage( int left, int top, void *bitmap, int op );

What I was not able to do is load the bitmap from the hard disk, i need to fill *bitmat and i don`t know how to do it.

Perhaps this could be basic, but i never had to do it before. I appreciate if you could help me with this.