c# 中调用advapi32.dll中的 RegCreateKeyEx如何定义

Question

[System.Runtime.InteropServices.DllImport("advapi32.dll")]
        private static extern int RegCreateKeyEx(
            uint hKey, 
            string lpSubKey, 
            uint Reserved, 
            string lpClass, 
            uint dwOptions, 
            uint samDesired, 
            uint lpSecurityAttributes, 
            ref uint phkResult, 
            ref uint lpdwDisposition 
            ); 

Answer 1

[DllImport("advapi32.dll", EntryPoint="RegCreateKeyEx")]
public static extern int RegCreateKeyEx (
int hKey,
string lpSubKey,
int Reserved,
string lpClass,
int dwOptions,
int samDesired,
ref SECURITY_ATTRIBUTES lpSecurityAttributes,
ref int phkResult,
ref int lpdwDisposition
);[StructLayout(LayoutKind.Sequential)]
public struct SECURITY_ATTRIBUTES {
public int nLength;
public int lpSecurityDescriptor;
public int bInheritHandle;
}

Answer 2

// RegQueryValueEx
//[System.Runtime.InteropServices.DllImport("coredll.dll")]
        private unsafe static extern int RegQueryValueEx( 
            uint hKey, 
            string lpValueName, 
            uint lpReserved, 
            out uint lpType, 
            byte * lpData, 
            ref uint lpcbData 
            );     
//
// RegOpenKeyEx 
//
System.Runtime.InteropServices.DllImport("coredll.dll")]
        private static extern int RegOpenKeyEx( 
            uint hKey, 
            string lpSubKey, 
            uint ulOptions, 
            uint samDesired, 
            ref uint phkResult 
            ); private static string GetStringValue(uint Key, string Name)
        {    
            uint buflen = 0;
            uint type = 0;
            char []str = null;
            unsafe
            {    
                                //Get the length of the value:
                int r = RegQueryValueEx(Key,Name,0,out type,null,ref buflen);
                if (type!=(uint)RegType.REG_SZ) throw new Exception ("The key is not of string value");                                //Create a buffer for the value:
                byte[] rez_buf = new byte ;                                //Retrieve the value to the buffer
                fixed(byte *charpointer=&rez_buf[0])
                {
                    int rez = RegQueryValueEx(Key,Name,0,out type,charpointer,ref buflen);
                    if (rez != 0) throw new Exception ("Can't get value");
                }                str = new char ;
                for (int i=0; i<buflen; i++)
                    str[i] = (char)rez_buf[i];            }    
            return new string (str);
        }
这是在mobile5.0上运行的把coredll改掉
我还用到了unsafe
你也可以不用。

Answer 3

这是用Reflector搞出来的
[DllImport("advapi32.dll", CharSet=CharSet.Auto)]
internal static extern int RegCreateKeyEx(SafeRegistryHandle hKey, string lpSubKey, int Reserved, string lpClass, int dwOptions, int samDesigner, SECURITY_ATTRIBUTES lpSecurityAttributes, out SafeRegistryHandle hkResult, out int lpdwDisposition);
 
需要把SafeRegistryHandle换成IntPtr[StructLayout(LayoutKind.Sequential)]
internal class SECURITY_ATTRIBUTES
{
    internal int nLength;
    internal unsafe byte* pSecurityDescriptor = null;
    internal int bInheritHandle;
}
  

Answer 4

还有一个帮看一下,我是这样定义的，可就是取不出值，
[DllImport("advapi32.dll", EntryPoint = "RegQueryValueExA", CharSet = CharSet.Ansi, SetLastError = true, ExactSpelling = true)]
        public static extern int RegQueryStringValue(int hKey, string lpValueName, int lpReserved, ref int lpType,string lpData, ref int lpcbData);string regData = "";
                regDataLength = 255;
                success = RegQueryStringValue(hKey, value, 0, ref regType, regData, ref regDataLength);
                if (success == 0)
                    functionReturnValue = regData;
帮看那错了

Answer 5

我是这样定义的，可就是取不出值，
[DllImport("advapi32.dll", EntryPoint = "RegQueryValueExA", CharSet = CharSet.Ansi, SetLastError = true, ExactSpelling = true)]
        public static extern int RegQueryStringValue(int hKey, string lpValueName, int lpReserved, ref int lpType,string lpData, ref int lpcbData);string regData = "";
                regDataLength = 255;
                success = RegQueryStringValue(hKey, value, 0, ref regType, regData, ref regDataLength);
                if (success == 0)
                    functionReturnValue = regData;
帮看那错了