[英]How do I change the tab stop length for a textbox in visual studio?
我正在为旧的袖珍PC编写代码编辑器程序,并且希望能够在多行文本框中更改\\t
字符的大小。
我已经寻找了很长时间,我发现了这个EM_SETTABSTOPS
,我不确定如何使用它,但我认为这是我需要使用的。 这有可能吗?
在您的表单类代码中:
private const UInt32 EM_SETTABSTOPS = 0x00CB;
private const int unitsPerCharacter = 4;
[DllImport("CoreDll.dll")]
static extern IntPtr SendMessage(IntPtr hWnd, UInt32 Msg, IntPtr wParam, ref IntPtr lParam);
然后添加一个功能
public static void SetTextBoxTabStopLength(TextBox tb, int tabSizeInCharacters)
{
// 1 means all tab stops are the the same length
// This means lParam must point to a single integer that contains the desired tab length
const uint regularLength = 1;
// A dialog unit is 1/4 of the average character width
int length = tabSizeInCharacters * unitsPerCharacter;
// Pass the length pointer by reference, essentially passing a pointer to the desired length
IntPtr lengthPointer = new IntPtr(length);
SendMessage(tb.Handle, EM_SETTABSTOPS, (IntPtr)regularLength, ref lengthPointer);
}
然后,在InitializeComponents()之后,使用多行文本框调用该函数。
资料来源: http : //www.pinvoke.net/default.aspx/user32.sendmessage
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