IconPro README.TXT notes.....
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IconPro Icon Manager

IconPro is designed to manipulate icons having images with bit depths from
1bpp to 32bpp, as well as sizes from 16x16 to 128x128.

IconPro provides no editing capabilities. To create an icon, the user must
first edit the image in DIB format, using a program like PBRUSH. Then the
image can be imported into IconPro without loss of bit depth.

Note that IconPro restricts the size of its child windows, so MDI tiling
can look different than expected.

When extracting icons from DLL and EXE files, IconPro will operate only on
32bit files.

On current versions of NT, icons may look distorted due to the fact that
current versions of NT do not support variable sized icons.

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IconPro Usage

IconPro displays icons in MDI child windows, showing you one image at a time.
Since an icon may contain more than one image, a list box is provided below
the display area to choose which image to look at.

IconPro is capable of reading and writing ICO files, as well as extracting
icons from Win32 PE format DLLs and EXEs. It can also import from/export
to BMP files and copy/paste with the clipboard. 

Holding the 'Control' key and left-clicking on the XOR mask will make the
program calculate new masks, using the pixel color at the mouse location as
the transparent color. 

Menu Options

File->New Icon
  This command creates a new icon resource and a window in which to display
  it. The newly created icon resource has no images in it. New images would
  need to be created using the "Edit->Add Format" command.
File->Open Icon File
  This command opens an ICO file and creates a new window in which to display
  its images. The images stored in the ICO file are enumerated in the listbox
  at the bottom of the display window.
File->Extract From DLL/EXE
  This command extracts an icon resource from a 32bit DLL or EXE file. (It
  will fail on 16bit files). If the file contains more than one icon 
  resource, a dialog is shown allowing the choice of which icon resource to
  extract.
File->Close
  This command closes the current icon resource child window. If the image
  has been modified, a dialog will be shown asking whether to save changes.
File->Save ICO File
  This command saves the current icon resource to its ICO file.
File->Save As ICO File
  This command saves the current icon resource to a newly named ICO file.
File->Exit
  This command terminates IconPro.
Edit->Copy
  This command causes the XOR mask of the current icon resource's current
  image to be placed on the clipboard in CF_DIB format.
Edit->Paste
  This command takes the CF_DIB format image from the clipboard and uses it
  to replace the XOR mask of the current icon resource's current image. If
  the clipboard image is larger than the current icon image, only the corner
  of the image is used. If the clipboard image is smaller than the current
  icon image, some of the resultant icon image may be black or undefined.
Edit->Stretch Paste
  This command takes the CF_DIB format image from the clipboard and uses it
  to replace the XOR mask of the current icon resource's current image,
  stretching it to fit the dimensions of the icon image.
Edit->Import BMP
  This command reads a BMP file and uses it to replace the XOR mask of the
  current icon resource's current image. If the BMP bitmap is larger than
  the current icon image, only the corner of the image is used. If the BMP
  bitmap is smaller than the current icon image, some of the resultant icon
  image may be black or undefined.
Edit->Stretch Import BMP
  This command reads a BMP file and uses it to replace the XOR mask of the
  current icon resource's current image, stretching it to fit the dimensions
  of the icon image.
Edit->Export BMP
  This command causes the XOR mask of the current icon resource's current
  image to be written to a newly named BMP file.
Edit->Add Format
  This command launches a dialog that allows the creation of a new icon
  image in the current icon resource. Slider controls are provided to allow
  the Width, Height, and Color Depth to be chosen. Valid ranges for these
  values are:
    Width: Min 16, Max 128
    Height: Min 16, Max 128
    Color Depth: Min 1bpp, Max 32bpp
  Two images with identical Width, Height and Color Depth are not allowed
  in the same icon resource.
Edit->Remove Format
  This command removes the current icon image from the current icon resource.
Window->Arrange Icons
  This command arranges the MDI child icons.
Window->Cascade
  This command arranges the MDI child windows in a cascade effect.
Window->Tile Horizontal
  This command horizontally tiles the MDI child windows.
Window->Tile Vertical
  This command vertically tiles the MDI child windows.
Help->Contents
  This command launches help for IconPro.
Help->About
  This command displays the About box.

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Icons in Win32

Icon images are stored in ICO files and as resources in EXEs and DLLs in near
DIB format - a BITMAPINFO followed by XOR bits followed by AND bits. A block
of memory like this can be passed to CreateIconFromResourceEx() to create a
HICON from the resource. This API expects the bmiHeader.biHeight member of the
BITMAPINFO to be the sum of the heights of the XOR and AND masks. Further,
this API is not implemented on NT at this time, so CreateIconFromResource()
must be used instead.

When creating the AND mask for an icon (or any transparent BitBlt), a simple
method is to BitBlt from the source image to a mono bitmap and let GDI do the
conversions based on SetBkColor(). This will not work with DIBSections. Any
BitBlt'ing with DIBSections results in color mapping without regard to the
background color.

DIBSections can not be used in the ICONINFO structure passed to
CreateIconIndirect(). DDBs must be used there.

Currently, during the icon selection process in Windows 95, all bit 
depths >= 8 are treated as equal. Therefore, it is pointless to have both
a 24bpp and an 8bpp image in the same ICO file. When running in any video
mode of at least 8bpp, Windows will simply choose the first one. Further,
in 8bpp mode, icons are always displayed using the system palette.

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ICO File Format

Icons are normally stored in ICO files. The ICO file format is documented in
the Windows 3.1 SDK Programmer's Reference, Volume 4: Resources, 
Chapter 1: Graphics File Formats.

The ICO file starts with an ICONDIR structure. The ICONDIR structure is 
defined as:

typedef struct 
{
    WORD           idReserved;   // Reserved
    WORD           idType;       // resource type (1 for icons)
    WORD           idCount;      // how many images?
    ICONDIRENTRY   idEntries[1]; // entries for each image (idCount of 'em)
} ICONDIR, *LPICONDIR;


The ICONDIRENTRY structure is defined as:

typedef struct
{
    BYTE        bWidth;          // Width of the image
    BYTE        bHeight;         // Height of the image (times 2)
    BYTE        bColorCount;     // Number of colors in image (0 if >=8bpp)
    BYTE        bReserved;       // Reserved
    WORD        wPlanes;         // Color Planes
    WORD        wBitCount;       // Bits per pixel
    DWORD       dwBytesInRes;    // how many bytes in this resource?
    DWORD       dwImageOffset;   // where in the file is this image
} ICONDIRENTRY, *LPICONDIRENTRY;


So, the file consists of the header followed by the bits for each image. The
bits for each image can be located by seeking to dwImageOffset in the file. 
The format of the bits follows:

  The bits for each image are stored in something similar to CF_DIB format. 
  First is a BITMAPINFO structure, followed by the DIB bits of the XOR mask,
  followed by the DIB bits of the AND mask. 

  Note the following two caveats:
  1) The bmiHeader.biHeight member of the BITMAPINFO structure indicates
     the height of the XOR mask plus the height of the AND mask.
  2) The AND mask is monochrome, and has no BITMAPINFO.
 
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Notes about the IconPro source code

IconPro is an MDI app. Each child window stores a pointer to a structure in
its GWL_USERDATA location. This structure contains information such as the
handle to the listbox, the locations of various graphical elements in the
client area, and a pointer to the icon resource data.

The icon resource data is stored in a structure that contains normal
information like the number of images and info for each of those images. The
info for each image includes its width/height/bpp as well as the DIB format
memory blocks for the XOR and AND masks.

In the MDI child window, the icon is displayed using DrawIconEx() once over a
black background and once over a white background. The XOR and AND masks are
also displayed using standard DIB functions.

Holding the 'Control' key and left-clicking on the XOR mask will make the
program calculate new masks, using the pixel color at the mouse location as
the transparent color. This is implemented using the following slow, but 
effective method:
Loop through all the pixels in the source
If a given pixel matches the transparent color (GetPixel())
	then clear the bit in the XOR mask and set the bit in the AND mask
else
    clear the bit in the AND mask

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