Module1
　　OptionExplicit
　　PublicConstGWL_WNDPROC=(-4)

PublicConstWM_NCHITTEST=&H84
　　PublicConstHTCLIENT=1
　　PublicConstHTCAPTION=2

DeclareFunctionCallWindowProcLib"user32"Alias"CallWindowProcA"(ByVallpPrevWndFuncAsLong,ByValhWndAsLong,ByValMsgAsLong,ByValwParamAsLong,ByVallParamAsLong)AsLong
　　DeclareFunctionGetWindowLongLib"user32"Alias"GetWindowLongA"(ByValhWndAsLong,ByValnIndexAsLong)AsLong
　　DeclareFunctionSetWindowLongLib"user32"Alias"SetWindowLongA"(ByValhWndAsLong,ByValnIndexAsLong,ByValdwNewLongAsLong)AsLong

PublicprevWndProcAsLong

FunctionWndProc(ByValhWndAsLong,ByValMsgAsLong,ByValwParamAsLong,ByVallParamAsLong)AsLong
　　WndProc=CallWindowProc(prevWndProc,hWnd,Msg,wParam,lParam)
　　IfMsg=WM_NCHITTESTAndWndProc=HTCLIENTThen
　　WndProc=HTCAPTION
　　EndIf
　　EndFunction
　　

　　程序首先调用CallWindowProc,这样就可以从还回值的知当前的鼠标位置位于那一个区域,接着判断返回值是否等于HTCLENT(工作区)内,如果是,则将返回值设置成TICAPTION(标题区),这样就可以瞒过Windows,让Windows以为鼠标位于标题区内

Form1

OptionExplicit

PrivateSubCommand1_Click()
　　UnloadMe
　　EndSub

PrivateSubForm_Load()
　　prevWndProc=GetWindowLong(Me.hWnd,GWL_WNDPROC)
　　SetWindowLongMe.hWnd,GWL_WNDPROC,AddressOfWndProc
　　EndSub

PrivateSubForm_Unload(CancelAsInteger)
　　SetWindowLongMe.hWnd,GWL_WNDPROC,prevWndProc
　　EndSub