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A virtual disk library can be used in any application written using Visual C++, Visual Basic, Visual C#, Borland Delphi and C++ Builder.

Recall from Part 1 of this series, that the Windows Template Library (WTL) is available on the January 2000 Platform SDK and beyond. It’s an SDK sample produced by members of the ATL team chartered with building an ATL-based wrapper around the windowing portions of the Win32 API. In Part I, I covered WTL’s support for SDI, Multi-SDI, MDI, and explorer/workspace-style applications that use command bars, splitters, GDI wrappers, helper classes, and DDX. In Part II, I’ll give you a look into WTL’s common controls wrappers, common dialog wrappers, property sheets, printing, print preview, scrolling support, message cracking, filtering, and idle handling. I will demonstrate these features while building a new sample program: BmpView.

The Windows Template Library (WTL) is available on the January 2000 Platform SDK. It is an SDK sample produced by members of the ATL (Active Template Library) team chartered with building an ATL-based wrapper around the windowing portions of the Win32 API. Since version 2.0, ATL has had simple windowing wrapper classes, such as CWindow, CWindowImpl, and CDialogImpl. However, when compared with MFC, ATL’s windowing classes were little more than a tease. Even in ATL 3.0, there is no support for such popular features as MDI, command bars, DDX, printing, GDI, or even a port of the most beloved class in all of MFC, CString. Without these features WTL cannot satisfy the overwhelming majority of MFC programmers. WTL is what members of the ATL team think a windowing framework should be. Table 1 shows the list of features that WTL provides as compared to MFC.

Recall from Part 1 of this series, that the Windows Template Library (WTL) is available on the January 2000 Platform SDK and beyond. It’s an SDK sample produced by members of the ATL team chartered with building an ATL-based wrapper around the windowing portions of the Win32 API. In Part I, I covered WTL’s support for SDI, Multi-SDI, MDI, and explorer/workspace-style applications that use command bars, splitters, GDI wrappers, helper classes, and DDX. In Part II, I’ll give you a look into WTL’s common controls wrappers, common dialog wrappers, property sheets, printing, print preview, scrolling support, message cracking, filtering, and idle handling. I will demonstrate these features while building a new sample program: BmpView

The Windows Template Library (WTL) is available on the January 2000 Platform SDK. It is an SDK sample produced by members of the ATL (Active Template Library) team chartered with building an ATL-based wrapper around the windowing portions of the Win32 API. Since version 2.0, ATL has had simple windowing wrapper classes, such as CWindow, CWindowImpl, and CDialogImpl. However, when compared with MFC, ATL’s windowing classes were little more than a tease. Even in ATL 3.0, there is no support for such popular features as MDI, command bars, DDX, printing, GDI, or even a port of the most beloved class in all of MFC, CString. Without these features WTL cannot satisfy the overwhelming majority of MFC programmers. WTL is what members of the ATL team think a windowing framework should be. Table 1 shows the list of features that WTL provides as compared to MFC.

用VC实现屏幕逐渐变暗的效果，含源代码 适合VC6以上。