How can i put one small image on another big image at particular point

Hi,
I have combined two images but new mask image is totally overwrite and come in whitecolored not in original color.....
I have user CGImageMaskCreate, CGImageCreateWithMask......
But i want to put small image on big image at particular point...... that i m tired to search but i can't find.......
Any thing is remaining then pls tell me...
Thanks,
Haresh.

Check the Quartz2D documents on Apple's site. Do a search in your examples folder in the developer folder and on Apple's site for Masks. I haven't used them under this API but that's probably the best place to start.

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