我想把视图中增加滚动条功能，怎么办
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Coping from MSDN:
CScrollView::SetScrollSizes
void SetScrollSizes( int nMapMode, SIZE sizeTotal, const SIZE& sizePage = sizeDefault, const SIZE& sizeLine = sizeDefault );
Parameters
nMapMode
The mapping mode to set for this view. Possible values include:
Mapping Mode Logical Unit Positive y-axis Extends...
MM_TEXT 1 pixel Downward
MM_HIMETRIC 0.01 mm Upward
MM_TWIPS 1/1440 in Upward
MM_HIENGLISH 0.001 in Upward
MM_LOMETRIC 0.1 mm Upward
MM_LOENGLISH 0.01 in Upward
CScrollView::SetScrollSizes
void SetScrollSizes( int nMapMode, SIZE sizeTotal, const SIZE& sizePage = sizeDefault, const SIZE& sizeLine = sizeDefault );
Parameters
nMapMode
The mapping mode to set for this view. Possible values include:
Mapping Mode Logical Unit Positive y-axis Extends...
MM_TEXT 1 pixel Downward
MM_HIMETRIC 0.01 mm Upward
MM_TWIPS 1/1440 in Upward
MM_HIENGLISH 0.001 in Upward
MM_LOMETRIC 0.1 mm Upward
MM_LOENGLISH 0.01 in Upward
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