This is a Windows 95/98/NT screen capture utility... Just run capture, and a small camera will appear in the system Tray (the lower right corner of the screen, by the clock), if you left click on the camera, a screencap will be taken (by default it will be stored in the same directory you ran Capture from), if you right click on it, you bring up the menu of options. It should work at all screen resolutions and color depths, and outputs a Windows Bitmap (BMP) file. When you do a screencap, the icon on the system tray will simulate s little flash, so you know it's grabbed it!
From the right click menu, you can configure exactly what the program will do when you left click on the icon; there are a variety of options, so you get exactly what you're after. You can have it save the screen capture to either a file or the clipboard, or both; you can also have it capture the entire desktop, or just the active application window. You can have Capture name each screencap automatically, or you can have it prompt for a filename after each capture, as well as specifying the output directory for the files. Finally, you can also set a Hot Key to be used to trigger the screencap - unfortunately not all keys can be used (PrintScreen, for example, is used by the system and there fore cannot be used), but you can assign it to any other key combination you would like.
You also have access to quick-captures from the right-click menu, where you can quickly capture either the active window, or the whole desktop, regardless of what mode it defaults to.
Please note that the icon is more of a joke than anything (if you don't know what I mean, just look at it in the large icon view), although I must admit that it's grown on me, and I enjoy it now more than ever... I primarily did it for fun and to illustrate once and for all that I am *NOT* an artist :)