Download ResourceContainer.dll before testing this code. This DLL is nothing more but a resource storage containing five icons. It does not require any installation procedure; just copy it to your FoxPro directory.
A resource-only DLL can be created in VC++. It contains virtually no executable code but resources, such as icons, bitmaps, strings, and dialog boxes. The file created with the /NOENTRY linker option is always light-weighted with an overhead below 3K (Portable Executable headers).
Any other file containing compatible icon resources can be used, for example Shell32.dll. Normally this file locates in System32 directory and contains plenty colorful icons the system readily uses itself.
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Changing the dialog icon by sending the STM_SETICON message to the icon window is another approach (requires extra programming in C++). The STM_SETICON is usually sent before the dialog activates. The WMPARAM in this message is the HICON handle.
There are several ways of obtaining the HICON: loading icon from ICO file (call LoadIcon or LoadImage ), get an icon resource from executable or DLL (call LoadLibrary and then LoadImage). The SHGetFileInfo returns HICON handles for the file or for the file type specified.
On the screenshot below, the icon inside the MessageBox is retrieved from the Skype executable by calling the SHGetFileInfo. Such functionality can be programmed in FLL or DLL library.
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How to change display settings: screen resolution, screen refresh rate
