程序运行过程中动态改变控件大小的方法-.NET教程,组件控件开发

在程序运行期间改变控件大小要用到windowsapi函数

以下是主要的代码

[dllimport("user32.dll", entrypoint="getwindowlong")]

public static extern int getwindowlong (

int hwnd,

int nindex

);

[dllimport("user32.dll", entrypoint="setwindowlong")]

public static extern int setwindowlong (

int hwnd,

int nindex,

int dwnewlong

);

[dllimport("user32.dll", entrypoint="setwindowpos")]

public static extern int setwindowpos (

int hwnd,

int hwndinsertafter,

int x,

int y,

int cx,

int cy,

int wflags

);

public const int gwl_style = (-16);

public const int ws_thickframe = 0x40000;

const int swp_nosize = 0x1;

const int swp_nomove = 0x2;

const int swp_nozorder = 0x4;

const int swp_framechanged = 0x20 ;

private void button1_click(object sender, system.eventargs e)

{

int style = getwindowlong((int)this.textbox1.handle,gwl_style);

style |=ws_thickframe;

setwindowlong((int)this.textbox1.handle,gwl_style,style);

setwindowpos((int)this.textbox1.handle,(int)this.handle,0,0,0,0,swp_nozorder|swp_nosize|swp_nomove|swp_framechanged);

}