Capturing an Area (Visual C++ 5.0 and later)

Capturing an Area (Visual C++ 5 and later)

Take the following steps to add some code that will let you capture a triangular area.

1.	Start with the project you created in Capturing an Active Window.
2.	Add a command button and set the ID and Caption properties as follows:
	ID	Caption
	IDC_CAPAREA	Capture Area

3.	Press Ctrl-W to go to the MFC Class Wizard; then do the following:
	a.	Click the Message Maps tab.
	b.	In the Class Name combo box, select CScrCapDlg.
	c.	In the Object IDs list box, select IDC_CAPAREA.
	d.	In the Messages list box, select BN_CLICKED.
	e.	Click the Add function button. Choose OK for the default function name (OnCaparea).
	f.	Click the Edit Code button and code the OnCaparea procedure as follows:

void CScrCapDlg::OnCaparea()
{
   m_pLEADRasterScr->PutScaleMode (SCALEMODE_PIXEL);

   //set up the info window
   m_pLEADRasterScr->PutCaptureAreaShowInfoWindow (TRUE);
   m_pLEADRasterScr->PutCaptureAreaInfoTop (0.0f);
   m_pLEADRasterScr->PutCaptureAreaInfoLeft (0.0f);
   m_pLEADRasterScr->PutCaptureAreaInfoHeight (300.0f);
   m_pLEADRasterScr->PutCaptureAreaInfoWidth (300.0f);

   //show area size and cursor information on an opaque background
   m_pLEADRasterScr->PutCaptureAreaShowAreaSize (TRUE);
   m_pLEADRasterScr->PutCaptureAreaShowCursorPosition (TRUE);
   m_pLEADRasterScr->PutCaptureAreaShowOpaqueText (TRUE);

   //set text colors, fill colors, fill pattern, and line style
   m_pLEADRasterScr->PutCaptureAreaDrawLineColor (RGB(0, 0, 0));
   m_pLEADRasterScr->PutCaptureAreaTextBackColor (RGB(0, 0, 255));
   m_pLEADRasterScr->PutCaptureAreaTextForeColor (RGB(255, 255, 255));
   m_pLEADRasterScr->PutCaptureAreaFillBackColor (RGB(255, 0, 0));
   m_pLEADRasterScr->PutCaptureAreaFillForeColor (RGB(0, 0, 255));
   m_pLEADRasterScr->PutCaptureAreaFillPattern (CAPTURE_AREA_PATTERN_CROSS);
   m_pLEADRasterScr->PutCaptureAreaDrawLineStyle (CAPTURE_AREA_LINE_DASH);|

   //do not include the cursor in the image
   m_pLEADRasterScr->PutCaptureAreaIncludeCursor (FALSE);

   //do not enable the keyboard
   m_pLEADRasterScr->PutCaptureAreaEnableKeyboard (FALSE);

   //save a bitmap with a region
   m_pLEADRasterScr->PutCaptureAreaBitmapWithRegion (TRUE);

   //make the info window sensitive to the position of the cursor
   m_pLEADRasterScr->PutCaptureAreaSensitiveInfoWindow (TRUE);

   //zoom the image in the info window
   m_pLEADRasterScr->PutCaptureAreaZoomFactor (CAPTURE_AREA_ZOOM_BY2X);

   //use the cross lines cursor instead of the CaptureAreaDrawCursorIndex
   m_pLEADRasterScr->PutCaptureAreaUseCrossLinesCursor(TRUE);
   m_pLEADRasterScr->PutCaptureAreaShowDrawCursor (TRUE);

   //capture a triangular area
   m_pLEADRasterScr->CaptureArea (SCR_CAP_AREA_TRIANGLE);

   //assign the Screen Capture Control bitmap to the Main Control bitmap
   m_LEADRasterView1.GetRaster().SetBitmap(m_pLEADRasterScr->GetBitmap ());
}

4.	On the main menu, select Build> Build ScrCap.exe to build the project.
5.	On the main menu, select Build> Execute ScrCap.exe to run the project. Click on Capture Area, press F11, and click and drag to select the area to capture.