.NET (Core and Framework)

pb = new PictureBox[r*c];
            Point point = new Point(100, 100);
         
            //pb.Image = null;

            for (i = 0; i < r * c; i++)
            {
                pb[i] = new PictureBox();
               
                {
                    pb[i].Dispose();
                }
                
                pb[i].Image = null;
            }
            int w = 800 / r;
            int k = 0;
            int h = 700 / c;
            int a = w, b = h;
            for (i1 = 0; i1 < r; i1++)
            {
                b = 15;
                for (i2 = 0; i2 < c; i2++)
                {
                    
                   // this.TransparencyKey = Color.Transparent;
                    //pb.BackColor = Color.Transparent;
                    pb[k] = new PictureBox();
                    pb[k].Image = null;        
                    pb[k].Size = new Size(w, h);
                    this.Controls.Add(pb[k]);
                    if (i1 == 0 )
                    {
                        pb[k].Location = new Point(10, b);
                    }
                    else
                    {
                        pb[k].Location = new Point(a, b);
                    }
                    //a = a + w;
                    b = b + h;
                    Bitmap img=new Bitmap("d:\\puzzlesolver\\pieces\\piece"+i2.ToString()+i1.ToString()+".png");
                    Bitmap img1 = new Bitmap(img);
                    pb[k].Image = img1;
                    pb[k].SizeMode = System.Windows.Forms.PictureBoxSizeMode.Zoom;
                    pb[k++].Update();
                    this.Update();
                   // img.Dispose();
                    
                }
                a = a + w;
            }
            this.Update();

EUPICDSM_LINK int __stdcall EupicdsmGetFlashInfo(
	const int index, 
	int& numDrives,
	char* drives, 
	int& drives_len, 
	char* serial, 
	int& serial_len);

Vendor specifications:
drives [out] 
Pointer to char that receives the list of drive letters associated to the device. The drive letters have SCSI
format ( \\.\H: ) and they are separated by the terminating null character (ASCII code 0). A double terminating
null character is the end of list. If this parameter is NULL, function returns EUPICDSM_ERROR_PARAM_LEN
and iDriversLen receives the minimum size for containing the entire list.

EUPICDSM_LINK int __stdcall EupicdsmGetFlashInfoW(
	const int index, 
	int& numDrives,
	BSTR* pDrives, 
	BSTR* pSerial);

Vendor specifications: 
pDrives [out] 
Pointer to wide character string that receives the list of drive letters associated to the device. The drive
letters have SCSI format ( \\.\H: ) and they are separated by the terminating null character (ASCII code 0). A
double terminating null character is the end of list.

EupicdsmGetFlashInfo - NOT DECLARED in the example ! 

Declare Function EupicdsmGetFlashInfoW Lib "eupicdsm.dll" (
	ByVal iIndex As Long, 
	ByRef iNumDrives As Long, 
	ByRef pDrives As String, 
	ByRef pSN As String) As Long

Declare Function EupicdsmGetFlashInfo Lib "eupicdsm.dll" (
	ByRef index As Long, 
	ByRef numDrives As Long, 
	ByRef drives() As Byte, 
	ByRef drives_len As Long, 
	ByRef serial() As Byte, 
	ByRef serial_len As Long) As PD_RETURNVALUES

Declare Function EupicdsmGetFlashInfoW Lib "eupicdsm.dll" (
	ByRef iIndex As Long, 
	ByRef iNumDrives As Long, 
	ByRef pDrives As String, 
	ByRef pSN As String) As PD_RETURNVALUES