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Last time, I left you with a brief puzzle. Here are two approaches. I am not a GDI expert, so there may be even better solutions out there. To emphasize the transparency, I'll change the window background color to the application workspace color. BOOL WinRegisterClass(WNDCLASS *pwc) { pwc->hbrBackground = (HBRUSH)(COLOR_APPWORKSPACE + 1);...

Last time, we saw how to draw themed and unthemed radio buttons, and I mentioned that menu glyphs are trickier. They're trickier because they are provided as raw monochrome bitmaps instead of fully-formed color-coordinated bitmaps. First, let's do it wrong in order to see what we get. Then we'll try to fix it. Start with a clean new scratch prog...

The DrawFrameControl function allows you to render standard Windows elements in your custom controls. Let's start by simply rendering a selected radio button. Start with our new scratch program and make this very simple change: class RootWindow : public Window { ... protected: void PaintContent(PAINTSTRUCT *pps); ... }; void RootWindow::Pa...

Last time, I alluded to weirdness that can result in the normal cycle of destruction messages being thrown out of kilter. Commenter Adrian noted that the WM_GETMINMAXINFO message arrives before WM_NCCREATE for top-level windows. This is indeed unfortunate but (mistake or not) it's been that way for over a decade and changing it now would intro...

There are two window messages closely-associated with window destruction, the WM_DESTROY message and the WM_NCDESTROY message. What's the difference? The difference is that the WM_DESTROY message is sent at the start of the window destruction sequence, whereas the WM_NCDESTROY message is sent at the end. This is an important distinction when y...

One of the flags to the QueueUserWorkItem function is WT_EXECUTELONGFUNCTION. The documentation for that flag reads The callback function can perform a long wait. This flag helps the system to decide if it should create a new thread. As noted in the documentation, the thread pool uses this flag to decide whether it should create a new thread...

The function is not a SQL query. It's a very simple directory enumerator. There is a slightly fancier version called , but even that function doesn't add much at present beyond filtering for directories or devices. You don't get to pass it sort criteria like or "return the files/directories sorted smallest file first", or "return the files/dir...

One of the things that is interesting to me as a student of the Chinese languages is to recognize where the traditional and simplified Chinese scripts differ. Since this is my program, I'm going to hard-code the color for simplified Chinese script: maroon. To accomplish the highlighting, we take advantage of listview's custom-draw feature. Cus...

Now that we have our traditional-to-simplified pseudo-dictionary, we can use it to generate simplified Chinese words in our Chinese/English dictionary. class StringPool { public: StringPool(); ~StringPool(); LPWSTR AllocString(const WCHAR* pszBegin, const WCHAR* pszEnd); LPWSTR DupString(const WCHAR* pszBegin) { return AllocString(pszBegi...

One step we had glossed over in our haste to get something interesting on the screen in our Chinese/English dictionary program was the conversion from traditional to simplified Chinese characters. The format of the hcutf8.txt file is a series of lines, each of which is a UTF-8 encoded string consisting of a simplified Chinese character followed ...