[转贴]：WinAPI 源码

eachy

1. 
   
2. .......
   
3. int getWinSysFolder (resbuf *rb)
   
4. {
   
5.         int retCode, nSize = MAX_PATH + 1;
   
6.         char *lpBuffer = new char[nSize];
   
7. 
   
8.         if (lpBuffer == NULL)
   
9.                 return reportError(ERR_NO_MEM);
   
10.        
    
11.         if (GetSystemDirectory(lpBuffer, nSize) != 0)
    
12.                 retCode = acedRetStr(lpBuffer);
    
13.         else
    
14.                 retCode = RTFAIL;
    
15. 
    
16.         delete lpBuffer;
    
17.         return retCode;
    
18. }
    
19. 
    
20. int getWinFolder (resbuf *rb)
    
21. {
    
22.         int retCode, nSize = MAX_PATH + 1;
    
23.         char *lpBuffer = new char[nSize];
    
24. 
    
25.         if (lpBuffer == NULL)
    
26.                 return reportError(ERR_NO_MEM);
    
27.        
    
28.         if (GetWindowsDirectory(lpBuffer, MAX_PATH + 1) != 0)
    
29.                 retCode = acedRetStr(lpBuffer);
    
30.         else
    
31.                 retCode = RTFAIL;
    
32. 
    
33.         delete lpBuffer;
    
34.         return retCode;
    
35. }
    
36. 
    
37. int getTempFolder (resbuf *rb)
    
38. {
    
39.         int retCode, nSize = MAX_PATH + 1;
    
40.         char *lpBuffer = new char[nSize];
    
41. 
    
42.         if (lpBuffer == NULL)
    
43.                 return reportError(ERR_NO_MEM);
    
44.        
    
45.         if (GetTempPath(nSize, lpBuffer) != 0)
    
46.                 retCode = acedRetStr(lpBuffer);
    
47.         else
    
48.                 retCode = RTFAIL;
    
49. 
    
50.         delete lpBuffer;
    
51.         return retCode;
    
52. }
    
53. 
    
54. int getCursorPosition (resbuf *rb)
    
55. {
    
56.         int retCode;
    
57.         POINT pt;
    
58.         if (GetCursorPos(&pt) != 0)
    
59.         {
    
60.                 struct resbuf *pRb = acutBuildList(RTLONG, pt.x, RTLONG, pt.y, RTNONE);
    
61.                 retCode = acedRetList(pRb);
    
62.                 acutRelRb(pRb);
    
63.         }
    
64.         else
    
65.                 retCode = RTFAIL;
    
66. 
    
67.         return retCode;
    
68. }
    
69. .......

复制代码

masterhe

请注意：
char *lpBuffer = new char[nSize];
之后应该是：
delete []lpBuffer；不是delete lpBuffer

eachy

最初由 masterhe 发布
[B]请注意：
char *lpBuffer = new char[nSize];
之后应该是：
delete []lpBuffer；不是delete lpBuffer [/B]

我用Vs.net编译后有几个函数在CAD2004下出现错误，有的更使CAD崩溃，是仅是这个原因吗？我是一窍不通，只会对照书设置然后编译，哪段有问题删之然后编译。

masterhe

其实MSDN说的比较清楚,以GetSystemDirectory为例:
Return Values
If the function succeeds, the return value is the length, in TCHARs, of the string copied to the buffer, not including the terminating null character. If the length is greater than the size of the buffer, the return value is the size of the buffer required to hold the path.

If the function fails, the return value is zero.

所以再使用前加:
memset(lpBuffer,0,nSize);
或这后将
lpBuffer[函数返回值]='\0';
当然可以直接用CString,在MFC中基本没有必要再用CHAR*,CString的函数能适应全部情况,这是个人编程习惯,不强求.

zyp2671

多谢斑竹提点！

top198

版主厉害啊啊，牛人