OptionExplicit

PublicDeclareFunctionChangeDisplaySettingsLib"user32.dll"Alias"ChangeDisplaySettingsA"

(ByReflpDevModeAsDEVMODE,ByValdwFlagsAsLong)AsLong
PublicDeclareFunctionEnumDisplaySettingsLib"user32.dll"Alias"EnumDisplaySettingsA"(ByVal

lpszDeviceNameAsString,ByValiModeNumAsLong,ByReflpDevModeAsDEVMODE)AsLong

ConstDM_PELSHEIGHTAsLong=&H100000
ConstDM_PELSWIDTHAsLong=&H80000
ConstDM_BITSPERPELAsLong=&H40000
ConstDM_DISPLAYFREQUENCYAsLong=&H400000

ConstCCHDEVICENAMEAsLong=32
ConstCCHFORMNAMEAsLong=32
ConstCDS_TEST=&H4

PrivateTypeDEVMODE
dmDeviceNameAsString*CCHDEVICENAME
dmSpecVersionAsInteger
dmDriverVersionAsInteger
dmSizeAsInteger
dmDriverExtraAsInteger
dmFieldsAsLong
dmOrientationAsInteger
dmPaperSizeAsInteger
dmPaperLengthAsInteger
dmPaperWidthAsInteger
dmScaleAsInteger
dmCopiesAsInteger
dmDefaultSourceAsInteger
dmPrintQualityAsInteger
dmColorAsInteger
dmDuplexAsInteger
dmYResolutionAsInteger
dmTTOptionAsInteger
dmCollateAsInteger
dmFormNameAsString*CCHFORMNAME
dmUnusedPaddingAsInteger
dmBitsPerPelAsInteger
dmPelsWidthAsLong
dmPelsHeightAsLong
dmDisplayFlagsAsLong
dmDisplayFrequencyAsLong
EndType

'-------------------------------------------------------------------------------------------
'LngWidth//屏幕的宽（单位象素）
'LngHeight//屏幕的高（单位象素）
'IntColor//多少位颜色（e.g16or32）
'LngFrequency//屏幕的刷新频率
'
'声明：
'调用该函数时要确定所设置的值在系统所允许的设置范围内，比如系统的最大刷新频率位80，而你
'用把LngFrequency设位85，这样将带来无法预测的后果。
'------------------------------------------------------------------------------------------
PublicFunctionSetDisplaymode(LngWidthAsLong,LngHeightAsLong,IntColorAsInteger,

LngFrequencyAsLong)AsLong
DimNewDevmodeAsDEVMODE
DimlngPAsLong

'obtainsinformation
EnumDisplaySettings0&,0&,NewDevmode

WithNewDevmode
.dmFields=DM_PELSHEIGHTOrDM_PELSWIDTHOrDM_BITSPERPELOrDM_DISPLAYFREQUENCY
.dmPelsWidth=LngWidth
.dmPelsHeight=LngHeight
.dmBitsPerPel=IntColor
.dmDisplayFrequency=LngFrequency
EndWith

SetDisplaymode=ChangeDisplaySettings(NewDevmode,CDS_TEST)
EndFunction