如何得到指定字体指定字号的字的宽度

陈?

如题

hdm2968

字号*2（字号为数字）

系统崩溃

使用GetTextMetrics这个API可以返回对象使用的指定字体的结构
Private Declare Function GetTextMetrics Lib "gdi32" Alias "GetTextMetricsA" (ByVal hdc As Long, lpMetrics As TEXTMETRIC) As Long

Private Type TEXTMETRIC     '字体结构
tmHeight As Long
tmAscent As Long
tmDescent As Long
tmInternalLeading As Long
tmExternalLeading As Long
tmAveCharWidth As Long
tmMaxCharWidth As Long
tmWeight As Long
tmOverhang As Long
tmDigitizedAspectX As Long
tmDigitizedAspectY As Long
tmFirstChar As String * 1
tmLastChar As String * 1
tmDefaultChar As String * 1
tmBreakChar As String * 1
tmItalic As Byte
tmUnderlined As Byte
tmStruckOut As Byte
tmPitchAndFamily As Byte
tmCharSet As Byte
End Type

sandy_zc_1

这个好像是可以计算出来的。
每一号的字是多少磅，然后化成缇，最后化成像素。
具体的不太清楚。