如何从HICON确定图标的大小？ [英] How to determine the size of an icon from a HICON?

问题描述

我有一个由 HICON 标识的图标，我想以自定义控件为中心绘制。

I have an icon identified by an HICON handle that I want to draw centered on a custom control.

如何确定图标的大小以便我可以计算出正确的绘图位置？

How do I determine the size of the icon so that I can calculate the correct drawing position?

推荐答案

Win32 GetIconInfo 调用将返回图标的源位图，作为其响应的一部分。您可以从中获取图标图像大小。

The Win32 GetIconInfo call will return, as part of its response, the icon's source bitmap. You can get the icon image size from this.

Dim IconInf As IconInfo
Dim BMInf As Bitmap

If (GetIconInfo(hIcon, IconInf)) Then
    If (IconInf.hbmColor) Then ' Icon has colour plane
        If (GetObject(IconInf.hbmColor, Len(BMInf), BMInf)) Then
            Width = BMInf.bmWidth
            Height = BMInf.bmHeight
            BitDepth = BMInf.bmBitsPixel
        End If

        Call DeleteObject(IconInf.hbmColor)
    Else ' Icon has no colour plane, image data stored in mask
        If (GetObject(IconInf.hbmMask, Len(BMInf), BMInf)) Then
            Width = BMInf.bmWidth
            Height = BMInf.bmHeight \ 2
            BitDepth = 1
        End If
    End If

    Call DeleteObject(IconInf.hbmMask)
End If 

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