判断当前光标在哪个TextBox中代码,CSharp代码库,德仔网

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【CSharp】判断当前光标在哪个TextBox中

作者:dezai / 发布于2014/2/9/ 413

判断当前光标在哪个TextBox中


usingSystem;
usingSystem.Collections.Generic;
usingSystem.ComponentModel;
usingSystem.Data;
usingSystem.Drawing;
usingSystem.Linq;
usingSystem.Text;
usingSystem.Windows.Forms;
usingSystem.Runtime.InteropServices;
namespaceKey
{
publicpartialclassForm1:Form
{IntPtrptr=(IntPtr)null;
[DllImport("user32.dll")]publicstaticexternIntPtrGetForegroundWindow();[DllImport("user32.dll",CharSet=CharSet.Auto)]publicstaticexternIntPtrSendMessage(IntPtrhWnd,uintMsg,IntPtrwParam,IntPtrlParam);[DllImport("user32.dll")]staticexternuintGetWindowThreadProcessId(IntPtrhWnd,IntPtrProcessId);[DllImport("user32.dll")]staticexternboolGetGUIThreadInfo(uintidThread,refGUITHREADINFOlpgui);[DllImport("user32.dll")]
staticexternIntPtrSetFocus(IntPtrhWnd);[StructLayout(LayoutKind.Sequential)]publicstructGUITHREADINFO{publicintcbSize;publicintflags;publicIntPtrhwndActive;publicIntPtrhwndFocus;publicIntPtrhwndCapture;publicIntPtrhwndMenuOwner;publicIntPtrhwndMoveSize;publicIntPtrhwndCaret;publicRECTrectCaret;}
boolFind=false;
publicstaticGUITHREADINFO?GetGuiThreadInfo(IntPtrhwnd){if(hwnd!=IntPtr.Zero){
uintthreadId=GetWindowThreadProcessId(hwnd,IntPtr.Zero);GUITHREADINFOguiThreadInfo=newGUITHREADINFO();guiThreadInfo.cbSize=Marshal.SizeOf(guiThreadInfo);if(GetGUIThreadInfo(threadId,refguiThreadInfo)==false)returnnull;returnguiThreadInfo;}returnnull;}
publicForm1()
{
InitializeComponent();

}privatevoidForm1_Load(objectsender,EventArgse)
{
timer1.Interval=100;
timer1.Tick+=timer1_Tick;
timer1.Start();
}privatevoidtimer1_Tick(objectsender,EventArgse)
{
if(Find==false)
{
IntPtrhwnd=GetForegroundWindow();GUITHREADINFO?guiInfo=GetGuiThreadInfo(hwnd);if(guiInfo!=null)
{ptr=(IntPtr)guiInfo.Value.hwndCaret;if(ptr!=IntPtr.Zero&&ptr!=this.textBox1.Handle)
{
this.textBox1.Focus();
this.Visible=true;
Find=true;

SetFocus(this.Handle);
textBox1.Text="";
}}
}
}privatevoidForm1_KeyPress(objectsender,KeyPressEventArgse)
{

}privatevoidbutton1_Click(objectsender,EventArgse)
{
this.Visible=false;
SetFocus(this.Handle);stringtext=textBox1.Text;
for(inti=0;i<text.Length;i++)
{
SendMessage(ptr,0x0102,(IntPtr)(int)text[i],IntPtr.Zero);}
Find=false;

}
}
[StructLayout(LayoutKind.Sequential)]
publicstructRECT
{
publicintleft;
publicinttop;
publicintright;
publicintbottom;
}
}

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