C#

mr.mohsen wrote:

i can not open another connection to that database or anyoneelse untill previouse connection will be close.

Mark Salsbery
Microsoft MVP - Visual C++

"The DataReceived event is not guaranteed to be raised for every byte received. Use the BytesToRead property to determine how much data is left to be read in the buffer."

private void textBox1_TextChanged(object sender, EventArgs e)
{
	label1.Text = string.Format("You use {0} out of {1} characters", textBox1.Text.Length, textBox1.MaxLength);
}

byte[] bytes = new byte[BufferSize];
for (int i = 0; i < BufferSize; i++)
    bytes[i] = Marshal.ReadByte(pBuffer, i);

fixed (byte* pTmp = bytes)
{
    System.IntPtr pBuffer2 = new IntPtr((void*)pTmp);
    byte* p2 = (byte*)(void*)pBuffer2;
}

fixed (byte* pTmp = bytes) {
   byte* p2 = pTmp;
}

[DllImport("kernel32")]
public static extern void RtlMoveMemory(IntPtr dest, IntPtr src, int len);

System.IntPtr pBuffer2 = Marshal.AllocHGlobal(BufferSize); //Assign unmanaged memory
RtlMoveMemory(pBuffer2, pBuffer, BufferSize); //Copy memory
byte* p2 = (byte*)(void*)pBuffer2;
// Use p2 to access image pixels
Marshal.FreeHGlobal(pBuffer2); //Free unmanaged memory