Edit Question - KnowledgeHub

Title Body

I'm trying to determine how I can detect when the user changes the Windows Font Size from Normal to Extra Large Fonts, the font size is selected by executing the following steps on a Windows XP machine: Right-click on the desktop and select Properties. Click on the Appearance Tab. Select the Font Size: Normal/Large Fonts/Extra Large Fonts My understanding is that the font size change results in a DPI change, so here is what I've tried so far. My Goal: I want to detect when the Windows Font Size has changed from Normal to Large or Extra Large Fonts and take some actions based on that font size change. I assume that when the Windows Font Size changes, the DPI will also change (especially when the size is Extra Large Fonts What I've tried so far: I receive several messages including: WM_SETTINGCHANGE, WM_NCCALCSIZE, WM_NCPAINT, etc... but none of these messages are unique to the situation when the font size changes, in other words, when I receive the WM_SETTINGSCHANGE message I want to know what changed. In theory when I define the OnSettingChange and Windows calls it, the lpszSection should tell me what the changing section is, and that works fine, but then I check the given section by calling SystemParametersInfo and I pass in the action SPI_GETNONCLIENTMETRICS, and I step through the debugger and I make sure that I watch the data in the returned NONCLIENTMETRICS for any font changes, but none occur. Even if that didn't work, I should still be able to check the DPI when the Settings change. I really wouldn't care about the other details, every time I get the WM_SETTINGCHANGE message, I would just check the DPI and perform the actions I'm interested in performing, but I'm not able to get the system DPI either. I have tried to get the DPI by invoking the method GetSystemMetrics, also for each DC: Dekstop DC->GetDeviceCaps L

Tags (comma-separated) Cancel