利用Win32API函数操作注册表：
MFC对话框工程：SoftReg，将应用软件的使用次数写入注册表。
在OnInitDialog函数中添加：
/**//************************************************************************/
/**//* RegOpenKey(HKEY hKey,LPCTSRT lpSubKey,PHKEY phkResult)
打开注册表中指定的项或子项,hKey：根键，lpSubKey：将要打开的子项名称，
phkResult:返回打开的子项。如果成功，返回ERROR_SUCCESS
*/
/**//************************************************************************/
HKEY Key;
CString sKeyPath;
sKeyPath = "Software\\jerry";
if (RegOpenKey(HKEY_CURRENT_USER,sKeyPath,&Key)!=0
&& RegOpenKey(HKEY_CURRENT_USER,sKeyPath,&Key)!=ERROR_SUCCESS)
{
::RegCreateKey(HKEY_CURRENT_USER,sKeyPath,&Key);
::RegSetValueEx(Key,"TryTime",0,REG_SZ,(unsigned char*)"5",2);
::RegCloseKey(Key);
MessageBox("You can try this 5 times!","tip",MB_OK|MB_ICONEXCLAMATION);
}
else
{
CString sKeyTime;
int nTryTime;
LPBYTE Data=new BYTE[80];
DWORD TYPE=REG_SZ;
DWORD cbData=80;
::RegQueryValueEx(Key,"TryTime",0,&TYPE,Data,&cbData);
sKeyTime.Format("%s",Data);
nTryTime=atoi(sKeyTime);
if (nTryTime <= 1)
{
MessageBox("Please regist!","tip",MB_OK|MB_ICONSTOP);
return FALSE;
}
nTryTime--;
sKeyTime.Format("%d",nTryTime);
::RegSetValueEx(Key,"TryTime",0,REG_SZ,(unsigned char*)sKeyTime.GetBuffer(sKeyTime.GetLength()),2);
::RegCloseKey(Key);
MessageBox("You can try this "+sKeyTime+" times!"," tip",MB_OK|MB_ICONEXCLAMATION);
}posted on 2010-06-01 17:03
CrazyNerd 阅读(392)
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Windows编程