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Hello,everybody!I'm a new person,know some simple code.I 'm a Chinese and just a student,my English isn't very good,so I will make some mistake.Please forgive me!

Now,I have a question is about the dbSetWindowOff().
When I use this command,the window will change full screen.
But if I use some images in this , I just can see a black's background.
If I don't use the dbSetWindowOff(),will be normal!
You have try this question before?And how to work out?

Thank you have the patience to read my words and forgive my mistake!

I show my code.If somewhere make a mistake, grateful to you for pointing out!

#include "DarkGDK.h"

void setUp();
void setMusic();
void setMouse();
void setSync();
void setImage();
void mouseMove(int&,int&);

void DarkGDK()
{
int x,y;
setUp();
setMusic();
setMouse();
setSync();
setImage();
while(LoopGDK())
{
dbPasteImage(2,0,0,0);
//dbSprite(2,0,0,2);
x=dbMouseX();
y=dbMouseY();
mouseMove(x,y);
dbSprite(1,x,y,1);
if(dbEscapeKey())
{
dbRestoreWindow();
}
if(dbReturnKey())
{
dbMaximizeWindow();
}
if(dbSpaceKey())
{
dbSetWindowOff(); //question about this command!
}
if(dbControlKey())
{
dbSetWindowOn(); //I can't use the command to change my program to normal,when I use dbSetWindowOff() later .
}
dbSync();
}
dbWaitKey();
}

void setUp()
{
dbSetWindowTitle("武林");
dbMaximizeWindow();
dbDisableEscapekey();
}

void setMusic()
{
dbLoadMusic("music/战斗.mp3",1);
dbLoopMusic(1);
}

void setImage()
{
dbSetImageColorKey(0,0,0);
dbLoadImage("pic/mouse.bmp",1);
dbLoadImage("pic/fight.jpg",2);
dbOffsetSprite(1,3,0);
dbSetSpritePriority(1,1);
}

void setMouse()
{
dbHideMouse();
}

void setSync()
{
dbSyncOn();
dbSyncRate(100);
}

void mouseMove(int& x,int& y)
{
int spriteWidth=dbSpriteWidth(1);
int spriteHeight=dbSpriteHeight(1);
int screenWidth=dbScreenWidth()-1;
int screenHeight=dbScreenHeight()-1;
if(x<0)
{
x=0;
}
if(x+spriteWidth>screenWidth)
{
x=screenWidth-spriteWidth;
}
if(y<0)
{
y=0;
}
if(y+spriteHeight>screenWidth)
{
y=screenHeight-spriteHeight;
}
}

don't know if this exists in dark gdk, but it used to happen with dark basic...

what happened is that if you had stuff loaded, and changed screen resolution, or something that has a similar impact on the game window, it would "forget" everything done "before" that...

i.e. you'll need to reinitialize the screen once you have resized it. (load up everything again etc.)

overall i'd just go with keeping it windowed as long as you're developing then test if it runs if you turn it on to fullscreen mode.

i find it to be rather annoying when it takes considerably longer to start up the game, when developing.

Oh,you are right.

"what happened is that if you had stuff loaded, and changed screen resolution, or something that has a similar impact on the game window, it would "forget" everything done "before" that..."

Now,I know how to work out the problem!
Thank you,RomuluS85!