C++系统笔刷

PS_SOLID   Creates a solid pen.
PS_DASH   Creates a dashed pen. Valid only when the pen width is 1 or less, in device units.
PS_DOT   Creates a dotted pen. Valid only when the pen width is 1 or less, in device units.
PS_DASHDOT   Creates a pen with alternating dashes and dots. Valid only when the pen width is 1 or less, in device units.
PS_DASHDOTDOT   Creates a pen with alternating dashes and double dots. Valid only when the pen width is 1 or less, in device units.
PS_NULL   Creates a null pen.
PS_INSIDEFRAME   Creates a pen that draws a line inside the frame of closed shapes produced by the Windows GDI output functions that specify a bounding rectangle (for example, the Ellipse, Rectangle, RoundRect, Pie, and Chord member functions). When this style is used with Windows GDI output functions that do not specify a bounding rectangle (for example, the LineTo member function), the drawing area of the pen is not limited by a frame.
The second version of the CPen constructor specifies a combination of type, style, end cap, and join attributes. The values from each category should be combined by using the bitwise OR operator (|). The pen type can be one of the following values:

PS_GEOMETRIC   Creates a geometric pen.
PS_COSMETIC   Creates a cosmetic pen.
The second version of the CPen constructor adds the following pen styles for nPenStyle:

PS_ALTERNATE   Creates a pen that sets every other pixel. (This style is applicable only for cosmetic pens.)
PS_USERSTYLE   Creates a pen that uses a styling array supplied by the user.
The end cap can be one of the following values:

PS_ENDCAP_ROUND   End caps are round.
PS_ENDCAP_SQUARE   End caps are square.
PS_ENDCAP_FLAT   End caps are flat.
The join can be one of the following values:

PS_JOIN_BEVEL   Joins are beveled.
PS_JOIN_MITER   Joins are mitered when they are within the current limit set by the ::SetMiterLimit function. If the join exceeds this limit, it is beveled.
PS_JOIN_ROUND   Joins are round.