SAMPLE: MASKBLT - Sample Application

PSS ID Number: Q103348
Article last modified on 08-24-1993

3.10
WINDOWS

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The information in this article applies to:

 - Microsoft Windows Software Development Kit (SDK) for Windows
   version 3.1
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MASKBLT: Demonstrates Win32 MaskBlt Function
MASKBLT provides an easy-to-use demonstration of the MaskBlt function
in the Win32™ application programming interface (API). The program
displays a dialog box that allows you to manipulate the parameters to
MaskBlt. The main window has three sections: the source bitmap is
displayed in the center, the monochrome bitmap mask is displayed on
the right, and the destination bitmap is displayed on the left.
You can change the destination rectangle either from the dialog box or
by using the direct-manipulation object in the left section of the
window. Clicking and dragging the mouse in the upper-left corner moves
the rectangle; clicking and dragging the mouse in the lower-right
corner sizes the rectangle. The function requires only a starting
point (not a rectangle) for the source and mask bitmaps. Additional
direct-manipulation objects are provided for the source and for the
mask. You can move these objects by clicking and dragging with the
mouse.
You can change the raster operation for the MaskBlt function by
changing the values in the rightmost entry fields in the dialog box.
These entries are interpreted in hexadecimal. The combo box directly
below these fields lists all standard raster operations. When you
select a standard ROP from this combo box, the contents of the combo
box are copied into the ROP entry fields and used in the MaskBlt call.
MASKBLT provides Clipboard support as follows:
 - Press CTRL+INSERT to copy the destination image to the Clipboard.
 - Press SHIFT+INSERT to copy a bitmap from the Clipboard to the
   source region.
 - Press ALT+INSERT to do both. This key sequence copies the
   destination image to the Clipboard and then down to the source region.
The Microsoft® Windows NT™ version 3.1 operating system was not
available at the time this sample was acquired for the Microsoft
Developer Network CD. For this reason, the CD includes only the source
files for the sample, not the executable file or any DLLs. If you have
Windows NT version 3.1 installed on your system, you may copy the
source files to your hard drive and invoke the Windows NT make file to
build the sample.
KEYWORDS: CD4; _lclose; _lopen; _lread; AngleArc; BeginPaint; BitBlt;
ClientToScreen; CloseClipBoard; CreateCompatibleBitmap;
CreateCompatibleDC; CreateDialog; CreateDIBitmap; CreatePen;
CreateRectRgnIndirect; CreateWindow; DeleteDC; DeleteObject;
DispatchMessage; DPtoLP; EndPaint; FillRect; GetClassLong;
GetClientRect; GetClipboardData; GetClipBox; GetDC; GetDlgItemInt;
GetDlgItemtext; GetFileSize; GetMessage; GetObject; GetStockObject;
GetViewportOrgEx; GetWorldTransform; InvalidateRect; LineTo;
LoadAccelerators; LoadCursor; LoadIcon; LocalAlloc; LocalFree;
LocalHandle; LPtoDP; IsWindow; MaskBlt; MessageBox;
ModifyWorldTransform; MoveToEx; OpenClipboard; OpenFile; PostMessage;
PostQuitMessage; PtInRect; Rectangle; ReleaseCapture; ReleaseDC;
SelectClipRgn; SelectObject; SendDlgItemMessage; SendMessage;
SetCapture; SetClipboardData; SetCursorPos; SetDlgItemInt;
SetDlgItemText; SetROP2; SetViewportOrgEx; SetWindowPos;
SetWorldTransform; ShowWindow; StretchBlt
For Microsoft OnLine customers, MASKBLT is available in the
Software/Data Library as 4X77.ZIP and can be found by searching on the
word MASKBLT, the Q number of this article, or S14279. For CompuServe
Customers, MASKBLT can be downloaded from the file 4-77.ZIP in library
section number 4 of the MSDNLIB forum. MASKBLT was archived using the
PKware file-compression utility.

Additional reference words: 3.10
KBCategory:
KBSubcategory:
Copyright Microsoft Corporation 1993.