我不是高手,不过你的这个问题我可以解决。
==================================================Option ExplicitPrivate Declare Function EnumDisplaySettings _
Lib "user32" Alias "EnumDisplaySettingsA" ( _
ByVal lpszDeviceName As Long, _
ByVal iModeNum As Long, _
lpDevMode As Any) As Boolean
Private Declare Function ChangeDisplaySettings _
Lib "user32" Alias "ChangeDisplaySettingsA" ( _
lpDevMode As Any, _
ByVal dwflags As Long) As LongPrivate Type DEVMODE
dmDeviceName As String * 32
dmSpecVersion As Integer
dmDriverVersion As Integer
dmSize As Integer
dmDriverExtra As Integer
dmFields As Long
dmOrientation As Integer
dmPaperSize As Integer
dmPaperLength As Integer
dmPaperWidth As Integer
dmScale As Integer
dmCopies As Integer
dmDefaultSource As Integer
dmPrintQuality As Integer
dmColor As Integer
dmDuplex As Integer
dmYResolution As Integer
dmTTOption As Integer
dmCollate As Integer
dmFormName As String * 32
dmUnusedPadding As Integer
dmBitsPerPel As Integer
dmPelsWidth As Long
dmPelsHeight As Long
dmDisplayFlags As Long
dmDisplayFrequency As Long
End TypeConst DM_BITSPERPEL = &H40000
Const DM_PELSWIDTH = &H80000
Const DM_PELSHEIGHT = &H100000
Const DM_DISPLAYFREQUENCY = &H400000
Private Sub ChangeRes(lngPelsWidth As Long, _
lngPelsHeight As Long, _
intBitsPerPel As Integer, _
lngDisplayFrequency As Long)
Dim dm As DEVMODE
Call EnumDisplaySettings(0&, -1, dm)
dm.dmFields = DM_PELSWIDTH Or _
DM_PELSHEIGHT Or _
DM_BITSPERPEL Or _
DM_DISPLAYFREQUENCY
dm.dmPelsWidth = lngPelsWidth
dm.dmPelsHeight = lngPelsHeight
dm.dmBitsPerPel = intBitsPerPel
dm.dmDisplayFrequency = lngDisplayFrequency
Call ChangeDisplaySettings(dm, 1)
End Sub
Private Sub Command1_Click()
Call ChangeRes(800, 600, 32, 75) '75为刷新率
End Sub
==================================================Option ExplicitPrivate Declare Function EnumDisplaySettings _
Lib "user32" Alias "EnumDisplaySettingsA" ( _
ByVal lpszDeviceName As Long, _
ByVal iModeNum As Long, _
lpDevMode As Any) As Boolean
Private Declare Function ChangeDisplaySettings _
Lib "user32" Alias "ChangeDisplaySettingsA" ( _
lpDevMode As Any, _
ByVal dwflags As Long) As LongPrivate Type DEVMODE
dmDeviceName As String * 32
dmSpecVersion As Integer
dmDriverVersion As Integer
dmSize As Integer
dmDriverExtra As Integer
dmFields As Long
dmOrientation As Integer
dmPaperSize As Integer
dmPaperLength As Integer
dmPaperWidth As Integer
dmScale As Integer
dmCopies As Integer
dmDefaultSource As Integer
dmPrintQuality As Integer
dmColor As Integer
dmDuplex As Integer
dmYResolution As Integer
dmTTOption As Integer
dmCollate As Integer
dmFormName As String * 32
dmUnusedPadding As Integer
dmBitsPerPel As Integer
dmPelsWidth As Long
dmPelsHeight As Long
dmDisplayFlags As Long
dmDisplayFrequency As Long
End TypeConst DM_BITSPERPEL = &H40000
Const DM_PELSWIDTH = &H80000
Const DM_PELSHEIGHT = &H100000
Const DM_DISPLAYFREQUENCY = &H400000
Private Sub ChangeRes(lngPelsWidth As Long, _
lngPelsHeight As Long, _
intBitsPerPel As Integer, _
lngDisplayFrequency As Long)
Dim dm As DEVMODE
Call EnumDisplaySettings(0&, -1, dm)
dm.dmFields = DM_PELSWIDTH Or _
DM_PELSHEIGHT Or _
DM_BITSPERPEL Or _
DM_DISPLAYFREQUENCY
dm.dmPelsWidth = lngPelsWidth
dm.dmPelsHeight = lngPelsHeight
dm.dmBitsPerPel = intBitsPerPel
dm.dmDisplayFrequency = lngDisplayFrequency
Call ChangeDisplaySettings(dm, 1)
End Sub
Private Sub Command1_Click()
Call ChangeRes(800, 600, 32, 75) '75为刷新率
End Sub
结构怎么跟VC的不一样:VB的DEVMODE: dmDeviceName As String * 32
dmSpecVersion As Integer
dmDriverVersion As Integer
dmSize As Integer
dmDriverExtra As Integer
dmFields As Long
dmOrientation As Integer
dmPaperSize As Integer
dmPaperLength As Integer
dmPaperWidth As Integer
dmScale As Integer
dmCopies As Integer
dmDefaultSource As Integer
dmPrintQuality As Integer
dmColor As Integer
dmDuplex As Integer
dmYResolution As Integer
dmTTOption As Integer
dmCollate As Integer
dmFormName As String * 32
dmUnusedPadding As Integer
dmBitsPerPel As Integer //不同点Integer = 2Bytes
dmPelsWidth As Long
dmPelsHeight As Long
dmDisplayFlags As Long
dmDisplayFrequency As Long
因为VB使用Unicode所以等同于VC的DEVMODEW结构,VC的DEVMODEW结构的定义:
WCHAR dmDeviceName[CCHDEVICENAME];
WORD dmSpecVersion;
WORD dmDriverVersion;
WORD dmSize;
WORD dmDriverExtra;
DWORD dmFields;
union {
struct {
short dmOrientation;
short dmPaperSize;
short dmPaperLength;
short dmPaperWidth;
};
POINTL dmPosition;
};
short dmScale;
short dmCopies;
short dmDefaultSource;
short dmPrintQuality;
short dmColor;
short dmDuplex;
short dmYResolution;
short dmTTOption;
short dmCollate;
WCHAR dmFormName[CCHFORMNAME];
WORD dmLogPixels;
DWORD dmBitsPerPel; //不同点DWORD = 4Bytes
DWORD dmPelsWidth;
DWORD dmPelsHeight;
DWORD dmDisplayFlags;
DWORD dmDisplayFrequency;
为什么?
试试用VC的声明吧.dmBitsPerpel As Long
反正两者必有一个是错误的.