想不到会卡在这里

[turbidlimpid]

一个简单的读取注册表的程序，每次都是“无法获取相应键值”，明明是有那个键值的呀，困惑ing...
#include <windows.h>

int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine, int nShowCmd)
{
HKEY hKey;
TCHAR SubKeyName[]="SOFTWARE\\Microsoft\\Windows\\CurrentVersion";
TCHAR ValueName[]="ProductId";
DWORD dwType=REG_SZ;
LPSTR ValueData;
DWORD BufferSize=sizeof(ValueData);
if(RegOpenKeyEx(HKEY_LOCAL_MACHINE,SubKeyName,0,KEY_READ,&hKey)!=ERROR_SUCCESS)
{
MessageBox(NULL,"无法打开相应子键","Windows产品序列号查看器",MB_OK);
return -1;
}
if(RegQueryValueEx(hKey,ValueName,0,&dwType,(LPBYTE)ValueData,&BufferSize)!=ERROR_SUCCESS)
{
MessageBox(NULL,"无法获取相应键值","Windows产品序列号查看器",MB_OK);
return -1;
}
MessageBox(NULL,ValueData,"Windows产品序列号查看器",MB_OK);
RegCloseKey(hKey);
return 0;
}

[GZCompiler]

要一层层的打开，用RegOpenKeyEx返回的键值句柄作新的参数，打开下一级。

[GZCompiler]

要一层层的打开，用RegOpenKeyEx返回的键值句柄作新的参数，打开下一级。

[turbidlimpid]

我确实是先用RegOpenKeyEx得到一个hKey再用它作RegQueryValueEx里面的参数的呀。

[FAICHEN]

int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine, int nShowCmd)
{
HKEY hKey;
TCHAR SubKeyName[]="SOFTWARE\\Microsoft\\Windows\\CurrentVersion";
TCHAR ValueName[]="ProductId";
DWORD dwType=REG_SZ;
char *ValueData=NULL; //改正
DWORD BufferSize=sizeof(ValueData);
if(RegOpenKeyEx(HKEY_LOCAL_MACHINE,SubKeyName,0,KEY_READ,&hKey)!=ERROR_SUCCESS)
{
MessageBox(NULL,"无法打开相应子键","Windows产品序列号查看器",MB_OK);
return -1;
}
if(RegQueryValueEx(hKey,ValueName,0,&dwType,(LPBYTE)ValueData,&BufferSize)!=ERROR_SUCCESS)
{
MessageBox(NULL,"无法获取相应键值","Windows产品序列号查看器",MB_OK);
return -1;
}
MessageBox(NULL,ValueData,"Windows产品序列号查看器",MB_OK);
RegCloseKey(hKey);
return 0;
}
如上改正

[canoe_eyes]

"SOFTWARE\\Microsoft\\Windows\\CurrentVersion\\";

[FAICHEN]

HKEY hKey;
TCHAR SubKeyName[]="SOFTWARE\\Microsoft\\Windows\\CurrentVersion";
TCHAR ValueName[]="ProductId";
DWORD dwType=REG_SZ;
unsigned char * ValueData[100];

DWORD BufferSize=sizeof(ValueData);
if(RegOpenKeyEx(HKEY_LOCAL_MACHINE,SubKeyName,0,KEY_READ,&hKey)!=ERROR_SUCCESS)
{
::MessageBox(NULL,"无法打开相应子键","Windows产品序列号查看器",MB_OK);
return ;
}
if(RegQueryValueEx(hKey,ValueName,0,&dwType,(unsigned char *)ValueData,&BufferSize)!=ERROR_SUCCESS)
{
::MessageBox(NULL,"无法获取相应键值","Windows产品序列号查看器",MB_OK);
return ;
}
::MessageBox(NULL,(LPCTSTR)ValueData,"Windows产品序列号查看器",MB_OK);

RegCloseKey(hKey);


抱歉，刚调试了一下，应该可以

[FAICHEN]

unsigned char * ValueData[100];
哦，多了一个*阿，
unsigned char ValueData[100];