expose a property from the 子窗体
class 子窗体 : Form
{
public string YourText { get {return mtextbox.Text;}} ...
}子窗体1.Show();
MyTextBox.Text = 子窗体1.YourText;
class 子窗体 : Form
{
public string YourText { get {return mtextbox.Text;}} ...
}子窗体1.Show();
MyTextBox.Text = 子窗体1.YourText;
MyTextBox.Text = 子窗体1.YourText;otherwise, pass the 父窗体 object into 子窗体, and call 父窗体's properties or methods directly in 子窗体