some easy questions.

[FSA <propel chinaren com>]

English:
hello all, I have some questions, need help.

First, as we known , Gimp can produce "header" type image  file,
The GUM(Gimp User Manual) say this can use in C source, but how?


second, what different follow two statements?
gtk_widget_set_usize(GTK_WIDGET(window), 200, 200);
gtk_window_set_default_size(GTK_WINDOW(window), 200, 200);

third, I find ACDSee 3.1 can save image as XPM format ,and
 Gimp can open it , but in my gtk+ program can not open it ,
 when I open it with UltraEdit, I find it is not XPM format ,why
Gimp can open it ? but  I can not ?

My English is not very Good , if above is doubt, I am sorry.
Thanks in advance !

Chinese（GB）:

大家好，我有一些问题,需要大家帮助。

1、GIMP可以产生C头文件，但怎么在C代码中用呀？
2、 以下两个语句有什么不同？
   gtk_widget_set_usize(GTK_WIDGET(window), 200, 200);
   gtk_window_set_default_size(GTK_WINDOW(window), 200, 200);
3、 我发现ACDSee 3.1 可以保存图象为XPM格式，且GIMP可以打开它，
    但我在GTK程序中打开不了，我用UltraEdit打开XPM文件，发现它不是
    XPM格式，但为什么GIMP能打开，而我却不能？

本人先行谢过了。