C# Definition:

[Serializable, StructLayout(LayoutKind.Sequential, CharSet=CharSet.Auto)]
public struct TEXTMETRIC
{
    public int tmHeight;
    public int tmAscent;
    public int tmDescent;
    public int tmInternalLeading;
    public int tmExternalLeading;
    public int tmAveCharWidth;
    public int tmMaxCharWidth;
    public int tmWeight;
    public int tmOverhang;
    public int tmDigitizedAspectX;
    public int tmDigitizedAspectY;
    public char tmFirstChar;
    public char tmLastChar;
    public char tmDefaultChar;
    public char tmBreakChar;
    public byte tmItalic;
    public byte tmUnderlined;
    public byte tmStruckOut;
    public byte tmPitchAndFamily;
    public byte tmCharSet;
}

VB Definition

    <Serializable(), StructLayout(LayoutKind.Sequential, CharSet:=CharSet.Auto)> _
     Public Structure TEXTMETRIC
        Public tmHeight As Int32
        Public tmAscent As Int32
        Public tmDescent As Int32
        Public tmInternalLeading As Int32
        Public tmExternalLeading As Int32
        Public tmAveCharWidth As Int32
        Public tmMaxCharWidth As Int32
        Public tmWeight As Int32
        Public tmOverhang As Int32
        Public tmDigitizedAspectX As Int32
        Public tmDigitizedAspectY As Int32
        Public tmFirstChar As Char
        Public tmLastChar As Char
        Public tmDefaultChar As Char
        Public tmBreakChar As Char
        Public tmItalic As Byte
        Public tmUnderlined As Byte
        Public tmStruckOut As Byte
        Public tmPitchAndFamily As Byte
        Public tmCharSet As Byte
    End Structure

Notes:

None.