请教hellovfp大哥关于位图的问题
windows编程自学手册看到位图那一节 书中提供了一个Emerson2程序例子 我把.cpp .h .rc文件都录入到VC6中
因为是手抄的编译后出现很多错误 我都一一排除了 剩下最后三个错误 ：
D:\开发语言\练习程序\C语言\EMERSON2\Emerson2.cpp(134) : error C2679: binary '=' : no operator defined which takes a right-hand operand of type 'struct HBITMAP__ *' (or there is no acceptable conversion)
D:\开发语言\练习程序\C语言\EMERSON2\Emerson2.cpp(135) : error C2675: unary '!' : 'struct tagBITMAP' does not define this operator or a conversion to a type acceptable to the predefined operator
D:\开发语言\练习程序\C语言\EMERSON2\Emerson2.cpp(160) : error C2440: 'type cast' : cannot convert from 'struct tagBITMAP' to 'struct HBITMAP__ *'
No user-defined-conversion operator available that can perform this conversion, or the operator cannot be called
Error executing cl.exe.
貌似都是关于Bitmap的。
出错的就在下面这两个函数里
程序代码：/////////////////////////////
// Create window Load bitmap
// from resource
/////////////////////////////
#pragma argsused
BOOL skyline_OnCreate(HWND hwnd, CREATESTRUCT FAR * lpCreateStruct)
{
TEXTMETRIC TextMetrics;
skylineBitmap = LoadBitmap(hInstance, "skylineBitmap"); // 这句
if (!skylineBitmap) // 和这句
{
MessageBox(hwnd, "Not find skylineBitmap!",
"Fatal Error", MB_OK | MB_ICONERROR);
return FALSE;
}
HDC PaintDC = GetDC(hwnd);
GetTextMetrics(PaintDC, &TextMetrics);
ReleaseDC(hwnd, PaintDC);
TextHeight = TextMetrics.tmHeight + TextMetrics.tmInternalLeading;
SetScrollRange(hwnd, SB_VERT, 0, -1, FALSE);
return TRUE;
}
/////////////////////////////
// Destructor : Delete Bitmap
// from Memory
/////////////////////////////
#pragma argsused
void skyline_OnDestroy(HWND hwnd)
{
DeleteBitmap(skylineBitmap); // 这这函数
PostQuitMessage(0);
}用Go To Definition 看了下
源程序是这么定义函数和变量的
#define DeleteBitmap(hbm) DeleteObject((HGDIOBJ)(HBITMAP)(hbm))——————————————
// Varliables BITMAP skylineBitmap;————————————————————
程序代码：/* Bitmap Header Definition */
typedef struct tagBITMAP
{
LONG bmType;
LONG bmWidth;
LONG bmHeight;
LONG bmWidthBytes;
WORD bmPlanes;
WORD bmBitsPixel;
LPVOID bmBits;
} BITMAP, *PBITMAP, NEAR *NPBITMAP, FAR *LPBITMAP;如果我将 BITMAP skylineBitmap; 改成 BITMAP *skylineBitmap;
就只剩下一个编译错误 D:\开发语言\练习程序\C语言\EMERSON2\Emerson2.cpp(134) : error C2440: '=' : cannot convert from 'struct HBITMAP__ *' to 'struct tagBITMAP *'
Types pointed to are unrelated; conversion requires reinterpret_cast, C-style cast or function- style cast
后来就不知道这么弄了。
一大篇啊 麻烦看看。
Emerson2.rar
