palleagermark: Setup a Manged WPF control for drag 'n' drop

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Источник: http://www.agermark.com/2014/01/setu...ag-n-drop.html
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In an earlier post I have made an example of to make a form with a drag 'n' drop enabled WPF control.

Now, here is the initialization code to put a nice image in the control (which is a PictureBox control now), and set the transparency color of the control to the background color of , in this case, the tab page it is on:

private void initDropControl()
{
Image resImg;
System.Drawing.Image img;
System.Drawing.Color backGroundColor;
int colorR;
int colorG;
int colorB;
System.Windows.Forms.PictureBox dropControl;

// Get handle to the control
dropControl = ManagedHostDropFile.control();

// Setup event handlers for the control
dropControl.add_DragDrop(new ManagedEventHandler(this, 'dropFile_DragDrop'));
dropControl.add_DragEnter(new ManagedEventHandler(this, 'dropFile_DragEnter'));
dropControl.set_AllowDrop(true);

// Load the AX resource image
resImg = new Image();
resImg.loadResource(12452);

// Get the tab page background color
backGroundColor = System.Drawing.ColorTranslator::FromOle(TabPageLoadFile.backgroundColor());
colorR = backGroundColor.get_R();
colorG = backGroundColor.get_G();
colorB = backGroundColor.get_B();

// Set the transparancy color of the AX resource image to the tab page background color
resImg.transparent(true, colorR, colorG, colorB);

// Create an image object that the WPF control is able to load
img = System.Drawing.Image::FromHbitmap(new System.IntPtr(resImg.exportBitmap()));

// Add the image to the control
dropControl.set_Image(img);
}


Источник: http://www.agermark.com/2014/01/setu...ag-n-drop.html