话说 想编一个游戏玩，就是类似于 帝国或者三国志那样的，鼠标移动到边缘时，地图能够能够自由的移动。
可以实现了，但是有个问题一直解决不了。
我是笔记本电脑，一般的分辨率是 1366*768 因此 找了一段代码能够实现 设置分辨率，但是当程序运行的时候，画图怎么也画不满整个屏幕，右边总是留一段空白。
如果通过点击桌面---属性--设置好分辨率1024*768，不用程序代码设置，程序运行的时候能够画满整个屏幕。
但是作为游戏来说，必须是有游戏来自动识别原来的分辨率，然后设定游戏所需要分辨率，才是完美。
具体代码如下：
Dim Old_width, Old_height As Single '定义原来的分辨率
Dim DevM As DEVMODE '设置分辨率所用
Private Declare Function EnumDisplaySettings Lib "user32" Alias "EnumDisplaySettingsA" (ByVal lpszDeviceName As Long, ByVal iModeNum As Long, lpDevMode As Any) As Long '设定分辨率所用
Private Declare Function ChangeDisplaySettings Lib "user32" Alias "ChangeDisplaySettingsA" (lpDevMode As Any, ByVal dwFlags As Long) As Long '设定分辨率所用
Private Declare Function GdiTransparentBlt Lib "gdi32" (ByVal hdc1 As Long, ByVal X1 As Long, ByVal Y1 As Long, ByVal W1 As Long, ByVal H1 As Long, ByVal Hdc2 As Long, ByVal X2 As Long, ByVal Y2 As Long, ByVal W2 As Long, ByVal H2 As Long, ByVal Color As Long) As Long '绘图所用
Private Declare Function GetCursorPos Lib "user32" (lpPoint As POINTAPI) As Long '获取鼠标位置所用
'========以下设定分辨率所用
Const CCDEVICENAME = 32
Const CCFORMNAME = 32
Const DM_PELSWIDTH = &H80000
Const DM_PELSHEIGHT = &H100000

Const ENUM_CURRENT_SETTINGS = -1
Private Type DEVMODE
    dmDeviceName As String * CCDEVICENAME
    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 * CCFORMNAME
    dmUnusedPadding As Integer
    dmBitsPerPel As Integer
    dmPelsWidth As Long
    dmPelsHeight As Long
    dmDisplayFlags As Long
    dmDisplayFrequency As Long
End Type
'==完毕
'==以下获取鼠标位置所用
Private Type POINTAPI
        x As Long
        y As Long
End Type
Dim p As POINTAPI
'==完毕
Dim Xm, Ym As Single '设定地图从什么位置开始绘图
Private Sub Form_Load()
    Xm = 0 '定义初始绘图时地图从什么坐标开始画
    Ym = 0 '定义初始绘图时地图从什么坐标开始画
    '获取原来的分辨率，并保存在变量中
    EnumDisplaySettings 0, ENUM_CURRENT_SETTINGS, DevM
    Old_width = DevM.dmPelsWidth
    Old_height = DevM.dmPelsHeight
    '获取原来的分辨率完毕
    '设置目前的分辨率
    EnumDisplaySettings 0, 0, DevM
    DevM.dmFields = DM_PELSWIDTH Or DM_PELSHEIGHT
    DevM.dmPelsWidth = 1024 '设定成想要的分辨率
    DevM.dmPelsHeight = 768
    ChangeDisplaySettings DevM, 0
    '设置完毕
End Sub
Private Sub Form_MouseDown(Button As Integer, Shift As Integer, x As Single, y As Single)
If Button = 2 Then
    If MsgBox("退出吗？", vbOKCancel, "询问") = 1 Then
        EnumDisplaySettings 0, 0, DevM
        DevM.dmFields = DM_PELSWIDTH Or DM_PELSHEIGHT
        DevM.dmPelsWidth = Old_width '设回原分辨率
        DevM.dmPelsHeight = Old_height
        ChangeDisplaySettings DevM, 0
        Unload Me
    End If
End If
End Sub
Private Sub Timer1_Timer() '时间控件，没100毫秒重复一次
GetCursorPos p '获取鼠标的位置
Text1.Text = p.x '测试用，最后删掉
Text2.Text = p.y '测试用，最后删掉
'当鼠标的位置处于上下左右指定的位置时，修改Xm，YM使的开始绘制的地图发生变化，实现地图的移动
If p.x < 15 Then
    If Xm - 15 <= 0 Then
        Xm = 0
    Else
        Xm = Xm - 15
    End If
End If
If p.x > 1020 Then
    If Xm + 15 > Me.picture1.ScaleWidth - 1024 Then
        Xm = Me.picture1.ScaleWidth - 1024
    Else
        Xm = Xm + 15
    End If
End If
If p.y < 15 Then
    If Ym - 15 < 0 Then
        Ym = 0
    Else
        Ym = Ym - 15
    End If
End If
If p.y > 750 Then
    If Ym + 15 > Me.picture1.ScaleHeight - 768 Then
        Ym = Me.picture1.ScaleHeight - 768
    Else
        Ym = Ym + 15
    End If
End If
Me.Cls
GdiTransparentBlt Me.hdc, 0, 0, 1024, 768, Me.picture1.hdc, Xm, Ym, 1024, 768, RGB(255, 255, 255)  '绘制地图

End Sub

说明：表单为 无标题栏 可擦写 一个picture1 两个 text 一个 time 控件
下边就是运行的结果，已经实现了类似于帝国时代那种地图的移动方式,但就是画不满，为什么啊，请帮忙分析一下