'用这个试试。
Option Explicit

Private Declare Function CHOOSEFONT Lib "comdlg32.dll" Alias "ChooseFontA" (pChoosefont As CHOOSEFONT) As Long
Private Declare Function GlobalLock Lib "kernel32" (ByVal hMem As Long) As Long
Private Declare Function GlobalUnlock Lib "kernel32" (ByVal hMem As Long) As Long
Private Declare Function GlobalAlloc Lib "kernel32" (ByVal wFlags As Long, ByVal dwBytes As Long) As Long
Private Declare Function GlobalFree Lib "kernel32" (ByVal hMem As Long) As Long
Private Declare Sub CopyMemory Lib "kernel32" Alias "RtlMoveMemory" (hpvDest As Any, hpvSource As Any, ByVal cbCopy As Long)

Const REGULAR_FONTTYPE = &H400
Const CF_PRINTERFONTS = &H2
Const CF_SCREENFONTS = &H1
Const CF_BOTH = (CF_SCREENFONTS Or CF_PRINTERFONTS)
Const CF_EFFECTS = &H100&
Const CF_FORCEFONTEXIST = &H10000
Const CF_INITTOLOGFONTSTRUCT = &H40&
Const CF_LIMITSIZE = &H2000&
Const FW_NORMAL = 400
Const DEFAULT_CHARSET = 1
Const OUT_DEFAULT_PRECIS = 0
Const CLIP_DEFAULT_PRECIS = 0
Const DEFAULT_QUALITY = 0
Const DEFAULT_PITCH = 0
Const FF_ROMAN = 16
Const GMEM_MOVEABLE = &H2
Const GMEM_ZEROINIT = &H40

Private Type LOGFONT
lfHeight As Long
lfWidth As Long
lfEscapement As Long
lfOrientation As Long
lfWeight As Long
lfItalic As Byte
lfUnderline As Byte
lfStrikeOut As Byte
lfCharSet As Byte
lfOutPrecision As Byte
lfClipPrecision As Byte
lfQuality As Byte
lfPitchAndFamily As Byte
lfFaceName As String * 31
End Type

Private Type CHOOSEFONT
lStructSize As Long
hwndOwner As Long ' caller's window handle
hDC As Long ' printer DC/IC or NULL
lpLogFont As Long ' ptr. To a LOGFONT struct
iPointSize As Long ' 10 * size in points of selected font
flags As Long ' enum. Type flags
rgbColors As Long ' returned text color
lCustData As Long ' data passed to hook fn.
lpfnHook As Long ' ptr. To hook function
lpTemplateName As String ' custom template name
hInstance As Long ' instance handle of.EXE that
' contains cust. Dlg. Template
lpszStyle As String ' return the style field here
' must be LF_FACESIZE or bigger
nFontType As Integer ' same value reported to the EnumFonts
' call back with the extra FONTTYPE_
' bits added
MISSING_ALIGNMENT As Integer
nSizeMin As Long ' minimum pt size allowed &
nSizeMax As Long ' max pt size allowed if
' CF_LIMITSIZE is used
End Type
Private Function ShowFont() As String
Dim cf As CHOOSEFONT, lfont As LOGFONT, hMem As Long, pMem As Long
Dim fontname As String, retval As Long
lfont.lfHeight = 0 ' determine default height
lfont.lfWidth = 0 ' determine default width
lfont.lfEscapement = 0 ' angle between baseline and escapement vector
lfont.lfOrientation = 0 ' angle between baseline and orientation vector
lfont.lfWeight = FW_NORMAL ' normal weight I.e. Not bold
lfont.lfCharSet = DEFAULT_CHARSET ' use default character set
lfont.lfOutPrecision = OUT_DEFAULT_PRECIS ' default precision mapping
lfont.lfClipPrecision = CLIP_DEFAULT_PRECIS ' default clipping precision
lfont.lfQuality = DEFAULT_QUALITY ' default quality setting
lfont.lfPitchAndFamily = DEFAULT_PITCH Or FF_ROMAN ' default pitch, proportional with serifs
lfont.lfFaceName = "Times New Roman" & vbNullChar ' string must be null-terminated
' Create the memory block which will act as the LOGFONT structure buffer.
hMem = GlobalAlloc(GMEM_MOVEABLE Or GMEM_ZEROINIT, Len(lfont))
pMem = GlobalLock(hMem) ' lock and get pointer
CopyMemory ByVal pMem, lfont, Len(lfont) ' copy structure's contents into block
' Initialize dialog box: Screen and printer fonts, point size between 10 and 72.
cf.lStructSize = Len(cf) ' size of structure
cf.hwndOwner = Form1.hWnd ' window Form1 is opening this dialog box
cf.hDC = Printer.hDC ' device context of default printer (using VB's mechanism)
cf.lpLogFont = pMem ' pointer to LOGFONT memory block buffer
cf.iPointSize = 120 ' 12 point font (in units of 1/10 point)
cf.flags = CF_BOTH Or CF_EFFECTS Or CF_FORCEFONTEXIST Or CF_INITTOLOGFONTSTRUCT Or CF_LIMITSIZE
cf.rgbColors = RGB(0, 0, 0) ' black
cf.nFontType = REGULAR_FONTTYPE ' regular font type I.e. Not bold or anything
cf.nSizeMin = 10 ' minimum point size
cf.nSizeMax = 72 ' maximum point size
' Now, call the function. If successful, copy the LOGFONT structure back into the structure
' and then print out the attributes we mentioned earlier that the user selected.
retval = CHOOSEFONT(cf) ' open the dialog box
If retval <> 0 Then ' success
CopyMemory lfont, ByVal pMem, Len(lfont) ' copy memory back
' Now make the fixed-length string holding the font name into a "normal" string.
ShowFont = Left(lfont.lfFaceName, InStr(lfont.lfFaceName, vbNullChar) - 1)
Debug.Print ' end the line
End If
' Deallocate the memory block we created earlier. Note that this must
' be done whether the function succeeded or not.
retval = GlobalUnlock(hMem) ' destroy pointer, unlock block
retval = GlobalFree(hMem) ' free the allocated memory
End Function

Private Sub Command1_Click()
MsgBox ShowFont
End Sub