Question

各位老师，这个是结构体是什么意思啊，是MFC自动生成的。

typedef struct tagDIBSECTION {
BITMAP dsBm;
BITMAPINFOHEADER dsBmih;
DWORD dsBitfields[3];
HANDLE dshSection;
DWORD dsOffset;
} DIBSECTION, FAR *LPDIBSECTION, *PDIBSECTION;

Answer 1

dsBm
A BITMAP data structure that contains information about the device-independent bitmap: its type, its dimensions, its color capacities, and a pointer to its bit values.
dsBmih
A bitmap information header structure that contains information about the color format of the device-independent bitmap.
Note A bitmap information header structure may be one of the following: Operating System Bitmap Information Header
Windows NT 3.51 and earlier BITMAPINFOHEADER
Windows NT 4.0 and Windows 95 BITMAPV4HEADER
Windows NT 5.0 and Windows 98 BITMAPV5HEADER.

dsBitfields
Specifies three DWORD color masks for the device-independent bitmap. This field is only valid when the BitCount member of the Bitmap Information Header structure has a value greater than 8. Each color mask indicates the bits within a DWORD that are used to encode one of the three color channels (red, green, and blue).
dshSection
Contains a handle to the file mapping object that the CreateDIBSection function used to create the device-independent bitmap. If CreateDIBSection was called with a NULL value for its hSection parameter, causing the system to allocate memory for the bitmap, the dshSection member will be NULL.
dsOffset
Specifies the offset to the bitmap's bit values within the file mapping object referenced by dshSection. If dshSection is NULL, the dsOffset value has no meaning.

转自MSDN

Answer 2

DIB段，就是普通的bmp格式的图片的信息说明。