通过发送消息获得编辑框文本

示例：有三个编辑框，在第一、二个编辑框输入数字，

单击相加按钮结果显示在第三个编辑框

 

方式1：

int num1,num2,num3;

char ch1[10],ch2[10],ch3[10];

//::SendMessage(GetDlgItem(IDC_EDIT1)->m_hWnd,WM_GETTEXT,10,(LPARAM)ch1);

//::SendMessage(m_edit1.m_hWnd,WM_GETTEXT,10,(LPARAM)ch1);

//m_edit1.SendMessage(WM_GETTEXT,10,(LPARAM)ch1);

//m_edit2.SendMessage(WM_GETTEXT,10,(LPARAM)ch2);

GetDlgItem(IDC_EDIT1)->SendMessage(WM_GETTEXT,10,(LPARAM)ch1);

GetDlgItem(IDC_EDIT2)->SendMessage(WM_GETTEXT,10,(LPARAM)ch1);

num1=atoi(ch1);

num2=atoi(ch2);

num3=num1+num2;

itoa(num3,ch3,10);

GetDlgItem(IDC_EDIT3)->SendMessage(WM_SETTEXT,10,(LPARAM)ch1);

//m_edit3.SendMessage(WM_SETTEXT,0,(LPARAM)ch3);

方式2：

int num1,num2,num3;

char ch1[10],ch2[10],ch3[10];

SendDlgItemMessage(IDC_EDIT1,WM_GETTEXT,10,(LPARAM)ch1);

SendDlgItemMessage(IDC_EDIT2,WM_GETTEXT,10,(LPARAM)ch2);

num1=atoi(ch1);

num2=atoi(ch2);

num3=num1+num2;

itoa(num3,ch3,10);

SendDlgItemMessage(IDC_EDIT3,WM_SETTEXT,0,(LPARAM)ch3);

//穿插另外一个知识点：设置编辑框复选

//设置编辑框复选，文本框中字符索引1到3的文本

SendDlgItemMessage(IDC_EDIT3,EM_SETSEL,1,3);

//设置编辑框文本全部复选

SendDlgItemMessage(IDC_EDIT3,EM_SETSEL,0,-1);

//将焦点转到编辑框中

GetDlgItem(IDC_EDIT3)->SetFocus();