• Marcone (4/4) Jan 05 2020 I am using this code to load icon from local directory, but I
• JN (8/12) Jan 05 2020 https://docs.microsoft.com/en-us/windows/win32/api/winuser/nf-winuser-lo...
• ShadoLight (7/11) Jan 06 2020 Sort of correct... but not strictly correct. Typically the
• Rumbu (7/11) Jan 05 2020 You cannot load icons from res files.
• Marcone (4/16) Jan 05 2020 Very good! working using: LoadIcon(hInstance,

Marcone <marcone email.com> writes:

I am using this code to load icon from local directory, but I 
want to load icon from resource.res file:

wndclass.hIcon  = LoadImage( NULL, "icon.ico", IMAGE_ICON, 0, 0, 
LR_LOADFROMFILE| LR_SHARED | LR_LOADTRANSPARENT);

JN <666total wp.pl> writes:

On Sunday, 5 January 2020 at 13:33:35 UTC, Marcone wrote:
 I am using this code to load icon from local directory, but I 
 want to load icon from resource.res file:

 wndclass.hIcon  = LoadImage( NULL, "icon.ico", IMAGE_ICON, 0, 
 0, LR_LOADFROMFILE| LR_SHARED | LR_LOADTRANSPARENT);

https://docs.microsoft.com/en-us/windows/win32/api/winuser/nf-winuser-loadimagea

According to the docs, the first argument is NULL only for 
standalone images, otherwise you have to provide a valid 
HINSTANCE.

By the way, have you managed to add the res file into the binary? 
My understanding is that the res file should be added into the 
exe file by the rc command before it can be used.

ShadoLight <ettienne.gilbert gmail.com> writes:

On Sunday, 5 January 2020 at 13:52:27 UTC, JN wrote:
 On Sunday, 5 January 2020 at 13:33:35 UTC, Marcone wrote:

[snip]
 By the way, have you managed to add the res file into the 
 binary? My understanding is that the res file should be added 
 into the exe file by the rc command before it can be used.

Sort of correct... but not strictly correct. Typically the 
resource compiler (such as Microsoft's rc.exe) compiles 
xyzfile.rc into xyzfile.res.

xyzfile.res is then added into the exe by the linker during 
linking.

Rumbu <rumbu rumbu.ro> writes:

On Sunday, 5 January 2020 at 13:33:35 UTC, Marcone wrote:
 I am using this code to load icon from local directory, but I 
 want to load icon from resource.res file:

 wndclass.hIcon  = LoadImage( NULL, "icon.ico", IMAGE_ICON, 0, 
 0, LR_LOADFROMFILE| LR_SHARED | LR_LOADTRANSPARENT);

You cannot load icons from res files.

If you link your res file to the executable, you can load the 
icon using:

LoadIcon(GetModuleHandle(NULL), MAKEINTRESOURCE(youriconid));


The function LoadImage from above loads an icon from the file 
named icon.ico, not from a res file.

Marcone <marcone email.com> writes:

On Sunday, 5 January 2020 at 15:13:17 UTC, Rumbu wrote:
 On Sunday, 5 January 2020 at 13:33:35 UTC, Marcone wrote:
 I am using this code to load icon from local directory, but I 
 want to load icon from resource.res file:

 wndclass.hIcon  = LoadImage( NULL, "icon.ico", IMAGE_ICON, 0, 
 0, LR_LOADFROMFILE| LR_SHARED | LR_LOADTRANSPARENT);

 You cannot load icons from res files.

 If you link your res file to the executable, you can load the 
 icon using:

 LoadIcon(GetModuleHandle(NULL), MAKEINTRESOURCE(youriconid));


 The function LoadImage from above loads an icon from the file 
 named icon.ico, not from a res file.

Very good! working using: LoadIcon(hInstance, 
MAKEINTRESOURCE(youriconid)); becouse GetModuleHandle(NULL) is 
undefined here.