Flicker Free example with dialog

One can find several examples for flicker free drawing in MFC. (see for example Flicker Free Drawing In MFC) Here is an example done by myself. I used the CMemDC Class posted in Enhanced CMemDC. The example code for download:   FlickerFreeDemoBackground.zip (27,7 KiB) What is the magic? We need to make sure, that the background of our window is not painted when OnPaint is called. For that we need to...

Enhanced CMemDC

Flicker Free drawing onto a dc can be realised by using the class CMemDC by Keith Rule (Flicker free drawing using memory DC) I changed the Class in such a way that it supports the automatic resizing of images that have higher or lower size than the dc that it is painted onto. The change is thus from using BitBlt to StretchBlt. CMemDC.h #ifndef _MEMDC_H_ #define...

Streams in C++

Bei der Einarbeitung der Ein und Ausgabe von Daten in C++ bin ich bei der Suche nach Dokumentationen zu streams auf folgende Webseiten gestoßen: http://www.cplusplus.com/reference/iostream/ Ein- und Ausgabe in C++ – IO-Streams http://www.mathematik.uni-marburg.de/~cpp/streams/index.html Writing integers in different...

Convert Cstring to int

The solution is the following CString samplecstring; int i = _ttoi(samplecstring); further conversion examples are listed at http://www.codeproject.com/cpp/data_conversions.asp. Converting backwards from int to CString can be done via int i = 255; Cstring text; text.Format(_T("%d"),...

Add non modal dialog to project

If we have an existing project one needs to do the following steps to add an non-modal dialog. Example Project:   ModelessDialog.zip (45,5 KiB) Add a new dialog to the project and add a class for that dialog Add a member variable for the dialog to the application class. If our project is called ‘SecondDialog’ the application class would then look like this class CSecondDialogApp : public...

Disable deprecation of functions

When using old functions in MFC which happens quite easily when one imports old VS6 examples or has to use old projects one gets this warning quite often: warning C4996: ‘fopen’: This function or variable may be unsafe. Consider using fopen_s instead. To disable deprecation, use _CRT_SECURE_NO_WARNINGS. See online help for details. c:\programme\microsoft visual studio 8\vc\include\stdio.h(234): Siehe...