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an oval form:BOOL Ctestdlg::oninitdialog () { cdialog::oninitdialog (); ... CRGN Rgn; Rgn. CreateEllipticRgn (0,0,max,+); SetWindowRgn (rgn,true);}Figure One oval formFour, the drawing path method creates "region"The process for creating a "region" using this method is as follows:The first step is to draw the form shape you want to create.Some of the member functions in the CDC class are used in this step as follows:BOOL

increase load. Disadvantage: Log table maintenance needs to be completed by the business system, the business system business operation procedures need to be modified to log information. Log table maintenance is more troublesome, the original system has a greater impact. Heavy workload, large changes, there is a certain risk.(f) Oracle change data Capture (CDC mode)The data is judged by analyzing the log of the database itself. Oracle's change data C

ReferenceArticle: Bai Qiao Original: Beautification interface of VC Before each control is drawn, a wm_ctlcolor notification message is sent to its parent window. In the message processing function, you can set the foreground color, background color, and font of the control to display the text. The message processing function also requires that a paint brush handle be returned to erase the customer zone before the control is drawn. The message processing function of wm_ctlcolor ing is afx_ms

LOG_REUSE_WAIT_DESC for replication?The suspect was transferred to the CDC.SELECTis_cdc_enabled, Case whenIs_cdc_enabled= 0 Then 'CDC feature disabled' ELSE 'CDC feature enabled'ENDDescription fromSYS. DATABASESWHERENAME= 'XXXX'The library does open CDC and continues to check the health status of the

setbuttoncursor (hcursor );Void setslidepos (uint NPOs );Void setrange (uint Nmin, uint Nmax );Void setbitmap (uint nbkgnd, uint nslide );Protected:Afx_msg bool onsetcursor (cwnd * pwnd, uint nhittest, uint message );Afx_msg void onlbuttondown (uint nflags, cpoint point );PRIVATE:Uint m_nwidth;Void adjustposition ();Void drawslide (CDC * PDC );Void drawbackground (CDC * PDC );Uint m_ncurrentpos;Uint m_nmax

1. Why does the displayed image FLASH [/B]Most of our drawing processes are stored in the ondraw or onpaint functions. ondraw calls onpaint for screen display. When the window needs to be re-painted for any reason, the display area is always cleared with the background color before onpaint is called. The background color is often in a large contrast with the drawing content, in this way, the background color and the display image appear alternately in a short period of time, so that the [/B] dis

drawing speed being too slow or the display graphics being too complex. In fact, this is not true. The influence of the display speed of the drawing on the flashing is not fundamental. For example, in ondraw (CDC * PDC), write as follows: PDC-> moveTo (0, 0 );PDC-> lineto (100,100 ); This drawing process should be very simple and fast, but it will still flash when pulling the window changes. In fact, in principle, the more complex the process of draw

Author: Zhu JincanSource: http://blog.csdn.net/clever101/ The following are two methods of writing the onpaint function (the response function of the wm_paint message) in the dialog box. Statement 1: View plaincopy to clipboardprint?Void cmydlg: onpaint (){CDC * PDC = getdc ();// My drawing codeMydrawfunction (PDC );Releasedc (PDC );}Void cmydlg: onpaint (){CDC * PDC = getdc ();// My drawing codeMydrawfun

alpha can access file a, and the computer beta can access file B. Files A and B are very similar, alpha and beta computers are interconnected through low-speed networks. The data synchronization algorithm process based on dedupe technology is similar to rsync, which is described as follows:1. Beta uses data splitting algorithms, such as FSP (fixed-size partition) and CDC (content-defined chuking), to split file B into data blocks of equal or unequal

of template-Based C ++ classes to simplify the compilation of small and fast COM objects. To use the cimage class in the MFC program, the image header file atlimage. h must be included: (not included in vs08 SP1) # Include 1. Load bitmap files // Cimage can load JPG, BMP, Tif. PNG and other image files, while cbitmap can only load BMP image files if (! Pathfileexists (imgfilepath) return NULL; cimage nimage; nimage. Load (imgfilepath); Return nimage. Detach (); // The returned hbitmap can b

. ContentsThere are two available configuration types, that is, connection device configuration CDC (connected device configuration)) And connect the limited device to configure cldc (connected limited device configuration ).1.1.1 Connection Device ConfigurationCDC is applied to mobile devices with relatively large memory and powerful processor capabilities. The CDC specification uses memory optimizationThe

Region Fill Algorithm one. Objective: Master the basic principle and realization of ordered table method, understand simple interactive technology. two. Requirements: 1. Boundary seed interaction input; 2. The example contains a concave-convex polygon type; 3. Support color selection, pattern editing. three. Content: 1. Realization of Ordered table method; Find out the maximum minimum xmin,xmax,ymax,ymin of the transverse ordinate of the intersection point (x1,y1) of the scan line and the poly

screen and output to the printer are essentially the same, so the printing function is also implemented by the cview class. In the cview class, the source code automatically generated by the Application Wizard provides an ondraw (CDC * PDC) function. By reloading this function, you can use the PDC (device context) pointer provided by it, various images and data can be displayed on the screen. The printing of the cview class is implemented through the

Method 1: Stretchblt in onpaint Specifically: Comment out cdialog: onpaint () or put it to the end (Why ?), Add a textureCode [CPP] View plain Copy Print ? VoidCqqqqqdlg: onpaint () { If(Isiconic ()) { Cpaintdc DC (This);// Device context for painting Sendmessage (wm_iconerasebkgnd,Reinterpret_castWparam> (DC. getsafehdc (), 0 ); // Center icon in client rectangle IntCxicon = getsystemmetrics (sm_cxicon ); IntCyicon = getsystemmetrics (sm_cyicon

Method 1: This method actually uses a library for reading bitmap in The Book of classic VC image processing, Without this function library, there is not much practical value.This method directly uses the function library for reading and displaying BMP images.First, you must obtain the location of the area to be displayed:Cwnd * pwnd = getdlgitem (idc_bmp );Rect;Pwnd-> getclientrect ( rect );CDC * PDC = pwnd-> getdc ();Then call the function library//

the flash. If you set the background to NULL, the duplicate drawing will not flash.Of course, this will make the display of the window messy, because there is no background color for the originalThe drawn image is cleared, and the new image is superimposed.Some people may say that flashing is caused by the drawing speed being too slow or the graphics displayed are too complex,In fact, this is not true. The influence of the display speed of the drawing on the flicker is not fundamental.For examp

. If you set the background to NULL, the duplicate drawing will not flash.Of course, this will make the display of the window messy, because there is no background color for the originalThe drawn image is cleared, and the new image is superimposed.Some people may say that flashing is caused by the drawing speed being too slow or the graphics displayed are too complex,In fact, this is not true. The influence of the display speed of the drawing on the flicker is not fundamental.For example, in ond

doprepareprinting (cprintinfo * pinfo );// OverridablesPublic:Virtual bool isselected (const cobject * pdocitem) const; // support for Ole// Ole scrolling support (used for drag/drop as well)Virtual bool onscroll (uint nscrollcode, uint NPOs, bool bdoscroll = true );Virtual bool onscrollby (csize sizescroll, bool bdoscroll = true );// OLE drag/drop supportVirtual dropeffect ondragenter (coledataobject * pdataobject, DWORD dwkeystate, cpoint point );Virtual dropeffect ondragover (coledataobject

versa.Bool m_btracking; // This value is true when the mouse is not releasedBool m_bselected; // If the button is pressed, the value is true.Bool m_bfocus; // when the button is the current focus, the value is true. // OperationsPublic: // Overrides// Classwizard generated virtual function overrides// {Afx_virtual (cxpbutton)Protected:Virtual void presubclasswindow ();//} Afx_virtual // ImplementationPublic:Virtual void drawitem (lpdrawitemstruct );Virtual void dogradientfill (

Once # Include " ./Ctrlconfig. h " Class Cpngbitblt { Public : Cpngbitblt ( Void ); ~ Cpngbitblt ( Void ); Public : /* Function: Load PNG image filename: PNG Image path hbit: returned PNG Image handle */ Bool loadpngimage (lpctstr filename, hbitmap * Hbit ); /* Function: paste the PNG image to the DC. PDC: Target DC psrdc: Image dc drc: Target map area SRC: source Image Area Alpha: transparency (0 ~ 255) */ Void Biltpng (CDC * P