怎样将一个Bitmap任意部分Copy到另一个Bitmap

[wangcftxz]

如题
请大牛帮忙看一下，小弟万分感激。
谢谢！！！

[缘中人]

Graphics::TBitmap *Bitmap;

TRect   MyRect, MyOther;

MyRect = Rect(10,10,100,100);

MyOther = Rect(10,111,100, 201);
Bitmap = new Graphics::TBitmap;
Bitmap->LoadFromFile("c:\\windows\\tartan.bmp");
Form1->Canvas->BrushCopy(MyRect, Bitmap, MyRect, clBlack);
Form1->Canvas->CopyRect(MyOther, Bitmap->Canvas, MyRect);
delete Bitmap;

[缘中人]

Bitmap也有Canvas属性，后面的就一样了
Bitmap->Canvas->CopyRect

[wangcftxz]

Graphics::TBitmap *Bitmap;
Bitmap = new Graphics::TBitmap;
Bitmap->LoadFromFile("D:\\1.bmp") ;
Image1->Picture->Bitmap->Assign(Bitmap) ;


Graphics::TBitmap *Bitmap2;
Bitmap2 = new Graphics::TBitmap;

TRect MyRect, MyOther;
MyRect = Rect(10,10,100,100);
MyOther = Rect(10,10,100, 100);
Bitmap2->Canvas->CopyRect(MyOther, Bitmap->Canvas, MyRect);
Image2->Picture->Bitmap->Assign(Bitmap2) ;

delete Bitmap;
delete Bitmap2;

为什么Image2中什么都没有？

[wangcftxz]

请大家来看看 分不够我可以加

[ccrun.com]

你需要设定Bitmap2的宽和高，如：

Bitmap2->Width = 90;
Bitmap2->Height = 90;
Bitmap2->Canvas->CopyRect(MyOther, Bitmap->Canvas, MyRect);

[wangcftxz]

[Quote=引用 5 楼 ccrun 的回复:]

你需要设定Bitmap2的宽和高，如：

C/C++ code
Bitmap2->Width = 90;
Bitmap2->Height = 90;
Bitmap2->Canvas->CopyRect(MyOther, Bitmap->Canvas, MyRect);
[/Quote]

妖哥的答案往往都能一针见血，膜拜！

感谢两位的大力支持，结贴。