There is no doubt that image processing have been a focus in the study of computer graphics.The technology of image processing is developed greetly.And in a computer a image is pixel-based.We call them bitmap.The paper is focus on the processing of bitmap images.Then we take two images for example,showing how to apply images. In the first part I give an overall description of Visual C++.Because the project about the processing of bitmap images is realized by Visual C++. In the second part the definition of bitmap image is introduced.We also discuss types of other image files. The third part starts with DDB definitions .But it is mainly focuses on DIB.I created several functions on DIB.And we can call them from any part of the program later. The fourth part is devoted to the processing of bitmap images, such as shifting images,rotating images.I use mathematical functions for analysis of image processing. And the effect of applying images is shown by changing the transparency.The codes in VC++ environment are also in this part.