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Customizing a dotted CPen...

Posted on 1997-01-13
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Last Modified: 2013-11-20
I want to draw a grid on my DC.  Logically, a CPen  would be used.  When I create the CPen, I use the  PS_DOT option -  This is almost correct, but I would really like to allow the dots to be further apart...  How do I do this?
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Question by:skink
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chedrick earned 100 total points
ID: 1300097
There are two versions of CPen::CreatePen. Use this one:
BOOL CreatePen( int nPenStyle, int nWidth, const LOGBRUSH* pLogBrush, int nStyleCount = 0, const DWORD* lpStyle = NULL );

There is also an alternate constructor that allows you to use those (very important) last two arguments.

By setting the style to PS_USERSTYLE, the last two arguments allow you to pass an array of DWORDS that contains the line characteristics (dash and space lengths). nStyleCount is the number of (DWORD) elements in the array.
This array contains the dash/space pair values respectively.

You can use GetExtLogPen(...) to get the default values of this array and modify the array values to suit you specific needs.

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