Managed C++/CLI

#include "stdafx.h"
#pragma comment(lib,"libdb51")
using namespace System;
using namespace System::Runtime::InteropServices;

int main(array<System::String ^> ^args)
{
Db SigDb(0,0);
unsigned int oFlags= DB_CREATE;
SigDb.open(NULL,"SigDb.db",0,DB_BTREE,oFlags,0);
String^ HexSig="1E81F1C1176434";
wchar_t* a=( wchar_t* )Marshal::StringToHGlobalUni(HexSig).ToPointer() ;
wchar_t* A=( wchar_t* )Marshal::StringToHGlobalUni(HexSig).ToPointer();;

Dbt key1(a,100);
Dbt data1(A,100);

int ret= SigDb.put(NULL,&key1,&data1, DB_NOOVERWRITE);
if(ret==DB_KEYEXIST){
Console::WriteLine("You are trying to insert an exist key!");
}

SigDb.close(0);
Marshal::FreeHGlobal(IntPtr(A));
Marshal::FreeHGlobal(IntPtr(a));
return 0;
}

#include "stdafx.h"
#pragma comment(lib,"libdb51")
using namespace System;
using namespace System::Runtime::InteropServices;

int main(array<System::String ^> ^args)
{
Db SigDb(0,0);
unsigned int oFlags= DB_CREATE;
SigDb.open(NULL,"SigDb.db",0,DB_BTREE,oFlags,0);
String^ HexSig="1E81F1C1176434";
wchar_t* a=( wchar_t* )Marshal::StringToHGlobalUni(HexSig).ToPointer();

SigDb.open(NULL,"SigDb.db",0,DB_BTREE,oFlags,0);
wchar_t DDData[200];
Dbt getKey, getData;
getKey.set_data(a);

getKey.set_size(100);
getData.set_data(DDData);
getData.set_ulen(200);
getData.set_flags(DB_DBT_USERMEM);

if(SigDb.get(NULL,&getKey,&getData,0)==DB_NOTFOUND)
Console::WriteLine("Not Found !");
else
Console::WriteLine(" {0}",Marshal::PtrToStringUni((IntPtr)DDData));

Marshal::FreeHGlobal(IntPtr(a));

Console::ReadLine();
return 0;
}

Private Structure IconInfo
       Public fIcon As Boolean
       Public xHotspot As Int32
       Public yHotspot As Int32
       Public hbmMask As IntPtr
       Public hbmColor As IntPtr
   End Structure

   <DllImport("user32.dll", EntryPoint:="CreateIconIndirect")> _
   Private Shared Function CreateIconIndirect(ByVal iconInfo As IntPtr) As IntPtr
   End Function

   <DllImport("user32.dll", CharSet:=CharSet.Auto)> _
   Public Shared Function DestroyIcon(ByVal handle As IntPtr) As Boolean
   End Function

   <DllImport("gdi32.dll")> _
   Public Shared Function DeleteObject(ByVal hObject As IntPtr) As Boolean
   End Function

   Public Function CreateCursor(ByVal bmp As Bitmap) As Cursor

       'Setup the Cursors IconInfo
       Dim tmp As New IconInfo
       tmp.xHotspot = _gHotSpotPt.X
       tmp.yHotspot = _gHotSpotPt.Y
       tmp.fIcon = False
       If _gBlackBitBack Then
           tmp.hbmMask = bmp.GetHbitmap(Color.FromArgb(0, 0, 0, 0))
           tmp.hbmColor = bmp.GetHbitmap(Color.FromArgb(0, 0, 0, 0))
       Else
           tmp.hbmMask = bmp.GetHbitmap()
           tmp.hbmColor = bmp.GetHbitmap()
       End If

       'Create the Pointer for the Cursor Icon
       Dim pnt As IntPtr = Marshal.AllocHGlobal(Marshal.SizeOf(tmp))
       Marshal.StructureToPtr(tmp, pnt, True)
       Dim curPtr As IntPtr = CreateIconIndirect(pnt)

       'Save the image of the cursor with the _gBlackBitBack effect
       'Not really needed for normal use.
       'I use it to create a screen shot with the gCursor included
       _gCursorImage = Icon.FromHandle(curPtr).ToBitmap

       'Clean Up
       DestroyIcon(pnt)
       DeleteObject(tmp.hbmMask)
       DeleteObject(tmp.hbmColor)

       Return New Cursor(curPtr)
   End Function

public struct IconInfo
	{
		bool fIcon;
		int xHotspot;
		int yHotspot;
		System::IntPtr hbmMask;
		System::IntPtr hbmColor;
	};

	[System::Runtime::InteropServices::DllImport("user32.dll, EntryPoint:=CreateIconIndirect")]
	System::IntPtr CreateIconIndirect(System::IntPtr iconInfo);

	[System::Runtime::InteropServices::DllImport("user32.dll, CharSet:=CharSet.Auto")]
	bool  DestroyIcon(System::IntPtr handle);

	[System::Runtime::InteropServices::DllImport("gdi32.dll")]
	bool DeleteObject(System::IntPtr handl);

System::Windows::Forms::Cursor ^CreateCursor(Bitmap ^bmp, int xHotSpot, int yHotSpot)
			{
				
				// Setup the Cursors IconInfo
				IconInfo tmp;
				tmp.xHotspot = 3;
				tmp.yHotspot = 3;
				tmp.fIcon = false;
				bool _gBlackBitBack=false;
				if (_gBlackBitBack) {
					tmp.hbmMask = bmp->GetHbitmap(Color::FromArgb(0, 0, 0, 0));
					tmp.hbmColor = bmp->GetHbitmap(Color::FromArgb(0, 0, 0, 0));
				}
				else {
					tmp.hbmMask = bmp->GetHbitmap();
					tmp.hbmColor = bmp->GetHbitmap();
				}

				// Create the Pointer for the Cursor Icon
				IntPtr pnt= Marshal::AllocHGlobal(Marshal::SizeOf(tmp));
				Marshal::StructureToPtr(%tmp, pnt, true);
				
				IntPtr curPtr = CreateIconIndirect(pnt);

				// Clean Up
				DestroyIcon(pnt);
				DeleteObject(tmp.hbmMask);
				DeleteObject(tmp.hbmColor);

				
				return gcnew System::Windows::Forms::Cursor(curPtr);
			}