SetWindowExt

The previous extents of the window (in logical units) as aCSizeobject. If an error occurs, the x- and y-coordinates of the returnedCSizeobject are both set to 0.

CSize對象，是窗口擴展的前一次取值。出錯時，CSize對象返回的X，Y座標均設置為0。

Specifies the x-extent (in logical units) of the window.

指定視圖端口的X擴展（邏輯單位）。

Specifies the y-extent (in logical units) of the window.

指定視圖端口的Y擴展（邏輯單位）。

Specifies the x- and y-extents (in logical units) of the window.

指定視圖端口的X和Y擴展（邏輯單位）。

Sets the x- and y-extents of the window associated with the device context. The window, along with the device-context viewport, defines how GDI maps points in the logical coordinate system to points in the device coordinate system.

設置窗口擴展的X和Y擴展。窗口和設備上下文窗口説明了GDI如何將邏輯座標中的點映射到實際設備座標中。換言之，它們説明了GDI如何將邏輯座標轉換為設備座標。

When the following mapping modes are set, calls toSetWindowExtandSetViewportExtfunctions are ignored: 當設置以下映射模式時，對SetWindowExt和SetViewportExt的調用將被覆蓋MM_HIENGLISHMM_HIMETRICMM_LOENGLISHMM_LOMETRICMM_TEXTMM_TWIPSWhenMM_ISOTROPICmode is set, an application must call theSetWindowExtmember function before callingSetViewportExt.

當設置MM_ISOTROPIC 時，應用調用SetWindowExt成員函數，必須在調用SetViewportExt函數之前。