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Accepted
Daniel Briceño
Asked: 2022-09-28 15:51:36 +0800 CST 2022-09-28 15:51:36 +0800 CST

How to remove a button using win32APIS in c?

  • 772

I have a button in the main window, and the question came to me: ¿Como hago para eliminar ese mismo boton en tiempo de ejecucción. I thought to call the function: SendDlgItemMessage:

#include <windows.h>
#define ID_BUTTON 119
...
LRESULT CALLBACK WindowProcedure( HWND hwnd,UINT msg,WPARA wParam,LPARAM lParam ){
    switch(msg){
        case WM_CREATE:
            CreateWindow("button","Click Me for deleted mi.",WS_CHILD | WS_VISIBLE | BS_PUSHBUTTON | WS_TABSTOP,200,200,40,20,hwnd,(HMENU)ID_BUTTON,NULL,0 );
            break;
        case WM_COMMAND:
            switch( wParam ){
                case ID_BUTTON:
                    SendDlgItemMessage( hwnd,ID_BUTTON,WM_DESTROY,0,0);
                break;
            }
            break;
...
    }
    return 0;
}

Since the button is really a window, I decided to send it the message WM_DESTROYso that it will close, but when I click it it doesn't close it and it doesn't disappear either. I have verified that if you call the function SendDlgItemMessagewith a simple MessageBox.
I haven't been able to do it on the internet, I only get: ¿Como crear un boton con win32Apis?, but what I want is to close it, not create it.

How do I close the button? or how did you remove it?

c

1 Answers

  1. Best Answer

    With the function DestroyWindow(hWnd)you remove the button

    //..
case WM_COMMAND:
    switch( wParam ){
        case ID_BUTTON:
            DestroyWindow(hwnd);
        break;
    }
    break;
//..

    If you want to disable it use the functionEnableWindow

    EnableWindow(hwnd, TRUE);  // <-- TRUE para habilitar 
EnableWindow(hwnd, FALSE); // <-- FALSE para deshabilitar
    • 1