再一本图像书里看到的，不懂

amartapple 2002-11-10 07:04:15

今天在一本书中看到了如下代码，有这么些地方不明白，希望大家能给解释一下，谢谢

1。底下这个里面的 LPDWORD 应该是个数据类型吧，但它是什么类型呢，c++里没有呀，BITMAPINFOHEADER又是什么东西？
// 判断是否是Win 3.0的DIB
#define IS_WIN30_DIB(lpbi) ((*(LPDWORD)(lpbi)) == sizeof(BITMAPINFOHEADER))

2。BYTE WORD 是什么类型，C++也没有
typedef struct{
BYTE bManufacturer;
BYTE bVersion;
BYTE bEncoding;
BYTE bBpp;
WORD wLeft;
WORD wTop;
。
。
。
} HEADER;

3。看看下面的函数，LPSTR DWORD WORD HGLOBAL LPSTR 都不知道是什么数据类型，还有后面的 WINAPI 加在这里干什么
// 函数原型
BOOL WINAPI PaintDIB (HDC, LPRECT, HDIB, LPRECT, CPalette* pPal);
BOOL WINAPI CreateDIBPalette(HDIB hDIB, CPalette* cPal);
LPSTR WINAPI FindDIBBits (LPSTR lpbi);
DWORD WINAPI DIBWidth (LPSTR lpDIB);
DWORD WINAPI DIBHeight (LPSTR lpDIB);
WORD WINAPI PaletteSize (LPSTR lpbi);
WORD WINAPI DIBNumColors (LPSTR lpbi);
WORD WINAPI DIBBitCount(LPSTR lpbi);
HGLOBAL WINAPI CopyHandle (HGLOBAL h);

...全文

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qrlvls 2002-11-10

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LPDWORD = DWORD* = unsigned long *
BYTE = unsigned char
WORD = unsigned short

BITMAPINFOHEADER是位图文件头结构，在VC里面有

你到MSDN里面查一下全都知道了

cbc 2002-11-10

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LPDWORD Pointer to a DWORD.
BITMAPINFOHEADER是位图文件头结构,详见
http://www.csdn.net/Develop/Read_Article.asp?Id=12484

至于你后面的问题MSDN上都有,自己多看看MSDN就不会有这么多问题了

llwwwww 2002-11-10

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以下摘自MSDN

Data Types
This topic lists the data types most commonly used in the Microsoft Foundation Class Library. Most of the data types are exactly the same as those in the Windows Software Development Kit (SDK), while others are unique to MFC.

Commonly used Windows SDK and MFC data types are as follows:

BOOL A Boolean value.

BSTR A 32-bit character pointer.

BYTE An 8-bit integer that is not signed.

COLORREF A 32-bit value used as a color value.

DWORD A 32-bit unsigned integer or the address of a segment and its associated offset.

LONG A 32-bit signed integer.

LPARAM A 32-bit value passed as a parameter to a window procedure or callback function.

LPCSTR A 32-bit pointer to a constant character string.

LPSTR A 32-bit pointer to a character string.

LPCTSTR A 32-bit pointer to a constant character string that is portable for Unicode and DBCS.

LPTSTR A 32-bit pointer to a character string that is portable for Unicode and DBCS.

LPVOID A 32-bit pointer to an unspecified type.

LRESULT A 32-bit value returned from a window procedure or callback function.

UINT A 16-bit unsigned integer on Windows versions 3.0 and 3.1; a 32-bit unsigned integer on Win32.

WNDPROC A 32-bit pointer to a window procedure.

WORD A 16-bit unsigned integer.

WPARAM A value passed as a parameter to a window procedure or callback function: 16 bits on Windows versions 3.0 and 3.1; 32 bits on Win32.
Data types unique to the Microsoft Foundation Class Library include the following:

POSITION A value used to denote the position of an element in a collection; used by MFC collection classes.

LPCRECT A 32-bit pointer to a constant (nonmodifiable) RECT structure.

llwwwww 2002-11-10